(Order Diptera, Superfamily Tipuloidea).
CHARLESP. ALEXA~DER

Amherst, Massachusetts

The crane-flies discussed at this time were included in verylarge and important collections made in various parts of Mexico
by Dr. Alfons Dampf, Professor of Applied Zoology and State
Entomologist.
Our knowledge of the crane-flies of this great
republic had hitherto been restricted to the relatively few
sppcics recorded by Osten Sacken and Williston in the"Biologia Centrali-Americana,"
together with a few scattered
dt'scriptions by the writer.
This fragmentary knowledge has
bt't'll vastly added to through the critical and systematiccollecting methods employed by Dr. Dampf.
In the present
installment a number of new species are described from various
localities in the vicinity of Mexico City. The habitats fromwhich the various collections were made will be discussed indetail in later papers by Dr. Dampf, those employed at thistime being included in the following Mexican Bioaenosis(M. B.) and Mexican Fauna (M. F.) numbers as adopted by
the collector:
Desierto de los leones: A wild forested region some 25-30
kms. southwest of Mexico City, situated in the mountains at analtitude of 3,000 meters and over. The characteristic trees are
Pinus montezunuc, P. leiophylla, Abies religiosa, Quercus, spp.,
and others, together with a dense undergrowth of many flowering
shrubs and weeds. M. B. 73 is a very deep shadowy ravine(Barranca de la min a vieja, Rio Tapazulco de los Morales,;jOlO-:3080 meters) in the Abies religiosa region, with a luxuriant
gro\vth of trees, shrubs and weeds. The very inconspicuous
rivulet seeks its way through big stones, blocks and overhanging rocks. M. B. Nos. 25, 67, 73, 114, etc.; M. F. No. GG.
CJzapingo:
The new site of the Escuela Nacional de Agricultura, situated nearly :30 kms. east of Mexico City, lying*Contribution from the Entomological
Agricultural College.
341

Laboratoryof the Massachusetts

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STUDIES ON THE CRANE-FLIES OF MEXICO.
PART I.

342

Annals Entomological Society of America[Vol. XVIII,

Dicranomyia Stephens.
Dicranomyia praepostera sp. n.
General coloration fawn-yellow; head gray above; wings tinged withpale yellow, the costal region and vein CUI seamed with darker; malehypopygium very complicated in structure.
Male. Length, 5.5-6 mm.; wing, 8.5-9 mm.
Rostrum obscure ochreous-yellow, moderately elongate; palpi
short, dark brown. Antennae with the basal segment obscure brownish
yellow, the apex and remaining segments brown; flagellar segments oval,
with short verticils. Head gray above, the frons, occiput and ventral
portions more yellowish.
Thorax uniformly fawn-yellow, the median area of the praescutum
a little more suffused but without distinct darker markings; scutellum
and postnotwn sparsely pruinose. Pleura reddish fawn-color, sparsely
pruinose. Halteres infuscated, the base of the stem narrowly yellowish.
Legs with the coxreand trochanters light yellow; femora obscure yellow,
the tips broadly dark brown; tibire brownish yellow, the tips narrowly
and indistinctly infuscated; tarsi gradually passing into dark brown.
Wings (Fig. 1) tinged with pale yellow, the costal region darker, thiscolor broadening out distally to include the outer radial cells; a conspicuous darker brown seam along vein C1tI and 1/t-CU; brown seams atarculus, SC2, tip of SCI and origin of Rs; a large oval spot at fork of Rs;

Downloaded from https://academic.oup.com/aesa/article-abstract/18/3/341/27203 by ESA Member Access user on 25 May 2020in the plain of tl;1e valley of Mexico between the Lago Texcoco
and the mountain chain called Tlaloc.
M. B. Nos. 29, 35, 44,47, etc.; M. F. No. 291.
.
Mt. Tlaloc: A mountain group lying northeast of Mexico
City, belonging to the Popocatepetl-Iztaccihuatl
chain.
M. B.
No. 67 is from the Abies religiosa region, altitude 2800-3200
meters, deep rocky barrancas with dead trees, dense forest
intermixed with brush.
Several of the novelties were included
under this number, the specimens having been swept from theAbies branches. M. B. Nos. 63, 63a, are from the Pinus region,
altitude 3000-3600 meters.
M. B. No. 64 is from the summit atapproximately
4000 meters, in treeless situations, with grassand creeping Cupressus between the rocks.
'Penon viejo or Penon marquez: An old volcano half-way
between Mexico City and Chapingo, situated on the southernborder of Lago Texcoco.
The specimens were collected bysweeping the vegetation in a deep muddy trench.
The writer wishes to express his thanks and appreciation to
Dr. Dampf for the privilege of collaborating in this importantinvestigation.
Through the kindness of the collector, thetypes of the novelties are retained in the writer's collection.

1925]

Alexander:

Crane-flies of Mexico

343

IIolotype, if, Mt. Tlaloc, region of Abies religiosa, altitude
28()()-:~200 meters, June 15, 1D24 (A. M. Dampf); M. B. No. 67.
Paratopotype,if.
Dicranomyia praepostera is a very distinct species with novery

close described

relatives.

Dicranomyia ravida sp. n.
General coloration light gray, the praescutum striped with darker;
antennae black throughout; wings subhyaline, the stigma faintly darker;
Sc short; cell 1st M2 closed; male hypopygium with the spines of therostrum unequal, curved.
Male. Length, 4.5-5 mm.; wing, 6-6.8 mm.
Female. Length about 5.8 mm.; wing about 6.8 mm.
Rostrum and palpi dark brown. Antennae black, the basal segment
pruinose; flagellar segments short-oval.
Head brownish gray, clearer
gray in front.
Pronotumgray, darker medially.
Mesonotum yellowish gray,clearer gray laterally, the praescutum with a conspicuous brown medianstripe and smaller, less distinct lateral stripes; scutal lobes extensively
infuscated; postnotum gray, darker laterally behind. Pleura light graypruinose.
Halteres pale, the knobs weakly infuscated.
Legs long andslender, the coxre reddish brown, the fore and middle coxre darker andmore or less pruinose basally; trochanters brownish yellow; remainderof lcgs dark brown, the bases of the femora brightened.
Wings subhyaline, the stigma faintly indicated; veins dark brown. Venation(Fig. 2): Sc short, SCI ending about its length before the origin of Rs;
Rs a trifle longer than the basal deflection of R4+5; 1n-CU at or immediately
before the fork of M.
Abdomen dark brownish gray, the hypopygium conspicuously
brownish yellow. Male hypopygium (Fig. 14) with the caudal marginof the ninth tcrgite (t) with a broad U-shaped notch, the laterallobcs low

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stigma darker at the ends, the center somewhat paler; cord and outerend of cell 1st M2 very narrowly seamed with brown. Venation:
SCI ending just beyond the origin of Rs, SC2 very far from its tip, lying
about mid-distance between arculus and the origin of Rs; m-cu somedistance before the fork of M.
Abdomen light brown, the genitalia passing into reddish brown; basal
sternites pale yellow. Male hypopygium (Fig. 13) very large andcomplicated in structure.
Ninth tergite (t) with a deep V-shaped
notch, the lateral lobes obtusely rounded, the margins of the notchwith delicate setal. Basistyle (b) relatively small and simple. Ventral
dististyle (v) very complicated, consisting of a kidney-shaped fleshy
lobe provided with relatively short retrorse setre; basal mesal portion
produced into a complicated blade that bears the short bispinous
rostrum.
Dorsal dististyle a powerful, flattened, sickle-shaped bladethat is expanded and truncate at tip. Gonapophyses (g) small, broad,the mesal apical angle provided with a short, erect lobe, the extreme tipof which is feebly decurved.

344

Annals EntomqlogicalSociety, of America[Vol. XVIII,

Holotype, 0', Chapingo, February 25, 1924 (A. M, Dampf);
M. B. 29. Allotopotype,<.;?, March 1, 1924.
Paratopotypes,
30' 0', March 5,1924, M. B. 35; 3 0' 0', March 31,1924, M. B.
44; 0', April 30, 1924, M. B. 47. Paratype, 0', Mexico, D. F.,
November 8, 1923 (A. M. Dampf).
tricomis sp. n.
General coloration yellowish brown, the praescutum somewhatbrighter with three conspicuous brownish black stripes; malehypopygium with the rostrum bearing three powerful straight spines.
Male.
Length, 5.6-6 mm.; wing, 6.8-7.6 mm.
Female. Length about 5 mm.; wing, 7 mm.
Rostrum and frons obscure yellow, the palpi brownish black.
Antennae brownish black throughout; basal flagellar segments short, theouter ones passing into oval, clothed with a delicate erect pale
pubescence. Head grayish brown, the vertex between the eyes darker.
Pronotum brownish black medially, passing into obscure yellow
laterally. Mesonotal praescu:tum obscure orange-yellow with threeconspicuous brownish black stripes, the median one broader and more
conspicuous; scutellum and postnotum gray pruinose. Pleura brown,
sparsely covered with a yellowish pollen, more pruinose behind.
Halteres relatively short, brown, the base of the stem indistinctly
brighter. Legs with the coxa: brown, the fore cox[edarker; trochantersobscure yellow; legs relatively long and slender; femora pale brown,brighter basally, with a vague darker ring immediately before the tips;
tibia; and basitarsi pale brown, their tips narrowly darkened; remainderof tarsi dark brown. Wings (Fig. 3) rather strongly tinged withbrown, the stigma scarcely indicated; veins dark brown. Venation:
Sc short, Sci ending opposite the origin of Rs, SCI a little shorter thanm-cu; Rs relatively long, feebly angulated at origin; 1Il-Clt at the forkof M.
Abdominal tergites dark brown, indistinctly variegated with paler;basal sternites yellowish, the more distal sternites yellowish basally;
hypopygium obscure yellowish brown. Male hypopygium (Fig. 15)
with the ninth tergite (t) broad, the caudal margin with a very shallow
emargination, on either side of the broad median space with a dense
patch of seta:. Basistyle with the mesal lobe conspicuously setiferous.
Ventral dististyle (v) fleshy, the rostrum large, semichitinized, andDicranomyia

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and' obtuse, provided with numerous set[e, Basistyles (b) relatively
small, only. sparsely setiferous, the mcsal lobe largc and conspicuous,
setiferous, Ventral dististyle (v) larger than the basistyle, with conspicuous seta:, the rostrum long, curvcd gently to the tip, ncar twothirds the length bearing the usual two spincs, these of generally similar
shape, but the more basal one about one-fourth shorter than the other,both geLtly curved basad. Dorsal dististyle relatively slender,
angularly arcuated to the long acute point. Gonapophyses (g) withthe mesal apical lobe curved gently laterad.

HI2;)]

Alexander:.

Crane-flies of Mexico

345

IIolotype,if, Mexico, D. F., January 30, 1924 (A. M.
Damp£). Allotopotype,~, March 7, 1924. Paratypes,
1 if,Penon viejo, May 11, 1924, M. B. 50; Penon marquez, 1 if,
March :~, H)2...l, M. B. ~H;1 if, March 5, 1924, M. B. 37.
Dicrallomyia
tricornis is distinguishedfrom the otherregional species of the genus by the presence of three spines on
the rostriform appendage of the male hypopygium.
Dicranomyia

filicauda sp. n.

General coloration gray, the rostrum yellow; pronotum and mesonotal praescutum with dark brown stripes; halteres elongate; wings
faintly tinged with brown, the stigma slightly darker; SCI long; malehypopygium very complex in structure, the tergal region with twolong, filiform lobes.
J1[ale. Length about 6.5 mm.; wing, 8.5-8.6 mm.
Rostrum light yellow; palpi dark brown. Antennre dark brown;
flagellar segments oval. Head dark gray, the front and orbits paler.
Pronotum gray, dark brown medially, the sides passing into buffy.
Mesonotal praeseutum gray, the humeral regions broadly ochreous,the dorsum with three conspicuous dark brown stripes, the medianstripe broad and conspicuous, the lateral stripes narrow and subobsolete;centers of scutal lobes dark, the median area pale; scutellum dark,
indistinctly pale medially and more distinctly so caudally; postnotal
mcdiotcrgite dark brown. Pleura pale, yellowish pollinose, with ashort and narrow pale brown longitudinal stripe extending across the
suture between the anepistemum and the stemopleurite. Haltereslong and slender, infuscated, the extreme bases pale. Legs with theeox;;cpale, the fore coxx slightly infuscated; trochanters obscure yellow;
femora brown, their bases paler; tips of femora indistinctly pale;remainder of legs passing into dark brown. Wings (Fig. 4) with a faintbrown tinge, the oval stigma pale brown; veins dark brown. Venation:
SCI cnding opposite the origin of Rs, SC2 some distance from the tip of
SCI, the latter alone about two-thirds Rs; cell 1st M2 closed, m being
about two-thirds the outcr deflection of Ms; m-cu a short distancebeyond the fork of M.
Abdominal tergites dark brown, the stemites and hypopygium moreyellowish. From the ventral surface of the ninth tergite arises a pairof long, slender lobes, directed caudad, their surface clothed with long,conspicuous setre; these lobes extend caudad beyond the other elementsof the hypopygium. Basistyles small, the ventra-mesal lobes longand exceedingly complex. Ventral dististyle fleshy, larger thanDownloaded from https://academic.oup.com/aesa/article-abstract/18/3/341/27203 by ESA Member Access user on 25 May 2020

with a row of three closely approximated spines of subequal size, placedon the side of the rostrum not far beyond its base; face of style at baseof rostnull further produced into a small fleshy lobe that is tufted witha few strong setx. Dorsal dististyle (d) a powerful flattened blade,widest near midlength, the apex drawn out into a long acute point.
Gonapophyses (g) with the caudal mesal angle relatively slender, curved.

346

Annals Entomological Society of America[Vol. XVIII.

Holotype, cJ', Desierto de los leones, altitude about 3000
meters, September 23, 1923 (A. M. Dampf).
Paratopotypes,
5 cJ' cJ', .December 9, 1923; M. F. 67.
This very remarkablecrane-fly is readily told from all
described members of the genus by the filiform structures
adorning the ninth tergite of the male hypopygium.
melanocera sp. n.
General coloration yellowish pollinose, the praescutum with a darkbrown median stripe; rostrum obscure yellow; palpi and antennae
black; halteres short, the knobs infuscated; wings subhyaline; Sc
relatively short; cell 1st M2 closed.
Male. Length about 4.5 mm.; wing, 5.4-5.5 mm.
Rostrum obscure yellow; palpi black. Antennae black throughout;flagellar segments oval. Head dark, brownish gray pruinose; vertex
between eyes broad.
Mesonotum pale, yellowish pollinose, with a broad, dark brown
median stripe that does not reach the suture; lateral stripes nearly
obsolete; scutum dark gray; scutellum obscure yellow, more grayish
basally; postnotal mediotergite gray. Pleura pale, sparsely pruinose,
the posterior scIerites paler. Halteres short, yellow, the large knobs
infuscated. Legs with the coxae pale, the fore coxae more infuscated;trochanters yellow; femora pale yellowish brown, passing into brown at
the tips; tibiae brown, the tips dark brown; tarsi black. Wings (Fig. 5)
subhyaline, the stigma oval, pale brown; veins darker brown. Venation:
Sc relatively short, SCI ending nearly its own length before the origin of
the short Rs, the latter oblique, somewhat angulated; Rs only a little
longer than the basal deflection of R4+5; inner ends of cells R3 and 1st M 2
lying basad of 'cell R5; cell 1st Mz closed, about equal to vein MI+2
beyond it; m-cu near fork of M, a little longer than the distal sectionof CUI.
Abdomen dark brown, the sternites paler; hypopygium pale brown.
Male hypopygium (Fig. 16) with the basistyles (b) produced mesad
into fleshy lobes. Ventral dististyle (v) large and fleshy, the rostrum
stout with two close-set spines; dorsal dististyle relatively small,arcuated, the long tip acute. Gonapophyses (g) with the mesal lobe
relatively slender, the tip subacute.
Dicranomyia

Holotype, cJ', Xochimilco,
Paratopotype, cJ'.

September

30,

1923

(A. M.

Dampf).

dampfi sp. n.
Allied to D. badia (Walker); general coloration black, the small
humeral angles of the praescutum paler; tips of femora obscure yellow;
wings strongly tinged with brown, the oval stigma darker brown.
.

Dicranomyia

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basistyle; dorsal dististyle a long, straight rod, the tip produced into anacute beak-like spine.

1\)21")]

Alexander:

Crane-flies of Mexico347

Rostnull, palpi and antennae black; flagellar segments oyal. Headblack.
Pnnwtu1ll and mesonotal praescutum black, only the restricted
hU1lleral angles of the latter a little paler; posterior sclerites ofll1csonottl1ndark brown. Pleura black, the anterior portion of the
propleura a little brighter; sternopleurite dark brown. Halteresblackish, the extreme base of stem pale. Legs with the coxae obscurebrownish yellow, the fore coxae darker; trochanters obscure yellow;
ft'nHlr:t dark brown, the extreme bases paler, the narrow tips conspicuously ohscure yellowish; tibiae and tarsi brownish black. Wings(Fig. Ii) strongly tinged with brown, the stigma oval, darker brown; apaler clotHlon anterior cord; paler areas before and beyond the stigma;
veins hrownish black. Venation: SCI ending immediately beyond theorigin of Rs, '\'(2 not far from the tip and before this origin; cellist 1112
cloSl'(I,a little shorter than yein MI+2 beyond it; 1IZ-Clt close to fork of M.
Ahdolllinaltergites dark brownish black, the sternites paler, yellowish
brown, thc hases of the individual segments a little brighter. Male
hypopygiu1llwith the ventral dististyle very large and fleshy, the shortrostrulll with two acute spines, placed almost at the tip. Gonapophysl's broad, the relatively short mesal lobe broad-based, gently
curwd, the subacute tip directed slightly laterad.
IIolotype,0', Desierto de los leones, altitude about 3000
meters, September 2:3, In23 (A. M. Dampf). Allotopot-ype, 9.
This interesting Dicral10myia is named in honor of thecollector, Dr. Alfons Dampf, to whom we are indebted forinvaluahle collections of Mexican insects and whose untiring
efforts have done very much toward making known the interesting fauna of Mexico. The species is related to D. badia (Walker)
from which it is told by the diagnostic characters listed above.
Limonia Meigen.
sp. n.
General coloration gray; head with two velvety-black lines thatare confluent before and behind; mesonotal praescutum with three conspicuous dark brown stripes; wings grayish subhyaline, spotted withbrown; Sc long; 11l-W before the fork of M; male hypopygium with abispinous rostrum; dorsal dististyle small, sickle-shaped,the tip obtusely
rounded.
J[ ale. Length about 4.5 mm.; wing, 6.6 mm.
Rostrwn and palpi dark brown. Antennae dark brown, the extreme
proximal ends of the basal flagellar segments indistinctly paler; flagellar
segments oval. Head dark gray, the anterior vertex golden-yellow,theposterior vertex with a velvety-black stripe that divides shortly, following the orbits for a brief distance, thence directed caudad, becoming
confluent on the occiput.
Limonia obtusistylus

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Male.
Length about 7 mm.; wing, D.6 mm.
Fcmale. Length about 7.5 mm.; wing, 10 mm.

348

AnnalsEntomologicalSociety of America[Vol. XVIII,

Holotype,0', Desierto de los leones, altitude:lOlO-3080
meters, July 20, 1924 (A. M. Dampf); M. B. No. 73.
Limonia obtusistylus is generally similar to the species of thesimulans group (simulans Walker, concinl1a Williston,etc.),
differingvery strikingly
in the structureof the malehypopygium.
The reference of the species in Limol1ia is basedon the length of the subcostal vein.
Elephantomyia Osten Sacken.
Elephantomyia alticola sp. n.
General coloration gray; wings with a faint brown tinge, the costal
margin and a conspicuous seam in cell M adjoining vein CUI darker
brown; abdominal tergites yellow, each segment with aT-shaped
brown mark; sternites uniformly dark brown.
Male. Length, excluding rostrum, 8.2 mm.; wing, 11.5 tUm.;
rostrum alone, 5 mm.
Rostrum relatively short, brownish black; pal pi eoncolorous.
Antennae black, only the apex of the second scapal segment a trifle

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Pronotum gray, dark brown above. l\Iesonotal praescutum yellowish gray with three conspicuous dark bro\vn stripes, the sublateralregions likewise indistinctly darkened; scutum grayish brown, indistinctly variegated with darker; scutellum light yellow; postnotulll
darkened. Pleura dark brown, heavily gray pruinosc, interrupted toleave srr..all patches of the ground-color. Haltercs yellow, the knobs
conspicuously dark brown. Legs with the coxae testaceous, sparsely
pruinose; trochanters obscure yellow; remainder of legs broken. Wings(Fig. 7) grayish subhyaline, sparsely spotted with brown; ground-color
clearest immediately before and beyond the stigma; subcostal celllargely occupied by three brown markings, restricting the ground-color
to two small spots; stigma pale brown with the ends vaguely darker;
wing-apex faintly suffused; the largest remaining spots are along thecostal region, at tip of SCI, at origin and fork of Rs; cord and outer end of
1st M2 narrowly seamed; a series of small brown spots in cells Rand Al,
with fewer scattered similar spots in cells Cu and 1sf A •.veins dark brown.
Venation: Sc long, SCI extending to just before mid-length of Rs; SC2
not evident in the unique type; m-cu some distance before the fork of M.
Abdomen brown, sparsely variegated with darker. l\lalc hypopygium (Fig. 17) with the caudal margin of the ninth tergitc (t) conspicuously notched medially. Basistyle (b) relatively small, with aconspicuous hemispherical setiferous lobe on mesal face. Ventral
dististyle (v) large and fleshy, the rostrum very small, with two longstraight spines that are much longer than the rostrum alone; cephalicmargin of rostrum with a fringe of seven or eight short setae. Dorsal
dististyle a small sickle-shaped blade, the apex obtuse. Gonapophyses
relatively small, appearing as flattened blades, the caudal mesal angle
produced, the apex curved gently laterad.

1\l2[)]

Alexander:

Crane-flies of Mexico

349

IIolotype, 0', Mt. Tlaloc, region of Abies religiosa, altitude
2XO()-;1200 meters, June 15, 1924 (A. M. Dampf); M. B. No. 67.
ElePhantomyia
alticola is very different from the described
speciesof the genus.

Gonomyia Meigen.
Gonomyia (Gon:omyia) tuberculata sp. n.
Belongs to the cognatella group; wings narrow, Sc short; Rs in alignment with RH5; cell 2nd A narrow; male hypopygium with the outerdististyle produced into a darkened tubercle before midlength.
Male. Length, 3.5-3.6 mm.; wing, 4.8-5.6 mm.
Rostrum and palpi dark brown. Antennae with the scapal segments
conspicuously light yellow; flagellum abruptly dark brown. Headyellow, the center of the vertex with a brownish black spot.
Pronotum dark brown, yellow on the sides. Mesonotal praescutumwith three dark brown stripes, the interspaces only a trifle paler so thedorsum appears almost uniformly dark; lateral margins of the praescutum broadly yellow; scutum dark brown, the median area narrowly
obscure yellow; scutellum brown, the margins broadly yellow; postnotal
mediotergite with a .i-shaped brown mark.
Pleura light yellow with ana1Tll\V dorsal dark brown stripe passing immediately above the baseof the halter to the postnatal mediotergite; sternopleurite less distinctly darkened.
Halteres elongate, the knobs and base of the stem
dark 'hrown, the remainder of the stem paler. Legs with the coxae
and trochanters testaceous; remainder of legs dark brown, the femoral

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paler. Heall yellowish gray, the vertex between the eyes about onethird wider than the diameter of the first sea pal segment.
PrOtlotulll dark brown, heavily dusted with gray. l"Iesonotum
dark hrown, hem'ily dusted with gray, the praescutum more yellowish
gray, the median area remaining broadly dark brown. Pleura darkgray, the llorso-pleural region buffy. Haltercs obscure brownish yellow,
the knohs darker brown. Legs with the coxae obscure yellow, theirbases slightly darker; trochanters obscure brownish yellow; femora
brown, the tips blackened, on the fore femora the black very extensive,
including all but the basal fourth; posterior femora with the black tips
narrow; tibiae and tarsi dark brown. Wings (Fig. 8) with a faint browntinge, the costal margin and a conspicuous seam along vein Oil in cell11[ darker brown, the two narrowly and indistinctly connected by ava!-,'l.1C
narrow seam along the cord; outer end of cell 1st 1112 likewise
indistinctly seamed; stigma oval, darker brown; veins dark brown,
Venation:
SCI ending beyond two-thirds
the length of Rs, SC2 a trifle
longer; Rs strongly angulated and weakly spurred at origin; 1ll-CU about
two-thirds its length beyond the fork of lvI.
Abllominal tergites obscure yellow, the intermediatesegments
brighter colored, the segments with dark brown inverted T-shaped
markings, the crossbar occupying the caudal margin of the segment;
sternites unifOlmly dark brown.

350

AnnalsEntomologicalSociety of America[Vol. XVIII,

S1l1UOus.

Holotype,

if, Penon marquez, March 5,1924 (A. M. Damp£);
36. Paratopotypes,
2 if if. Paratypes,
3 if if,Penon viejo, May 11,1924; M. B. No. 50; 2ifif,
Desierto delos leones, in swampy meadow, January 25,1925; M. B. No. 114.
Gonomyia tuberculata is allied to G. delicata Alexander(Guatemala), differing especially in the structure and venationof the wings. The male of the latter species is still unknown.

M.

B.

No.

Molophilus Curtis.
Molophilus severus sp. n.
General coloration dark brown; antennae short; knobs of halteresbright yellow; male hypopygium with the basal dististyle a powerfulgently curved, chitinized rod that is gradually narrowed to the acute tip.
M ale. Length, 3.6-3.8 mm.; wing, 5-5.2 mm.
Female. Length about 4.5 mm.; wing, 6.2-6.3 mm.
Rostrum and palpi black. Antennae short, black throughout;flagellar segments oval with relatively long setae. Head dark gray.
Pronotum dark brown, the sides obscure yellow. Mesonotal
praescutum reddish brown, the median area broadly darker brown, thehumeral region narro:wly obscure yellow; scutal lobes darkened;scutellum and postnotum dark. Pleura dark brown. Halteres paleyellow, the intermediate portion of the stem indistinctly darker, the'knobs brighter yellow. Legs with the coxae brownish testaceous;
trochanters testaceous yellow; femora pale brownish yellow, the tips
narrowly and indistinctly darkened; tibiae brownish yellow, the tips
and the tarsi dark brown. Wings with a strong brown tinge, thestigmal region darker; prearcular region indistinctly more yellowish;
veins dark brown. Venation: Vein 2nd A elongate, running generally

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bases paler. Wings (Fig. 9) narrow, with a faint brownish tingc;
stigma oval, darker brown; veins dark brown. Venation: Sc very
short, SCt ending a distance before the origin of Rs that is approximately
equal to the length of the latter vein alone, SCt short; T-m joining Rs
immediately before its fork; Rs in alignment with R4+f'; cell R2 relativcly
large; cell 2nd M2 deep; m-cu at fork of JI; cell 2nd A narrow.
Abdominal tergites dark brown, the sternites and hypopygium
yellow. Male hypopygium (Fig. 18) with the basistyle (b) produccd
into a cylindrical fleshy lateral lobe and a smaller mesal lobe. Outerdististyle an elongate, clavate, fleshy lobe, the mesal margin near
midlength produced into a darkened tubercle. Inner dististyle complex,
tripartite, consisting of a flattened paddle-like bladc with a single scta
on the disk; a fleshy setiferous lobe that terminates in two powerful
fasciculate setae, and a powerful chitinized spine, the latter varying indegree of stoutness in different specimens. Aedeagus (a) curved.
Gonapophyses (g) asymmetrical, the longest very slender, curved,t~rminating in a long acute spine; the second apophyse is small, gently

1925]

Alexander:

Crane-flies of Mexico

351

IIolotype,d', Desierto de los leones, altitude :3010-3080
meters, July 20, 1D24 CA. IV1. Dampf); M. B. No. 73. Allotopo(vpc, Q. Paratopolypes, 40 d' Q ; paratype, d', Chapingo,
July 14,1\)24; M. F. 2:37.
Molophilus paucispinosus

sp. n.

Gencral coloration dark brownish gray; knobs of halteres whitish;wings strongly infumed; vein 2nd A relatively short; male hypopygiumwith the basal dististyle terminating in a few strong spines.
J[ale. Length about 3.2 mm.; wing, 3.5 mm.
Rostrum and palpi brownish black. Antennal scape black, theflage1hullbroken. Hcad dark gray.
Pronotum dark, only the lateral portions of the posterior notum
obscure yellow. IVIesonotumdark brownish gray, the humeral region of
the praescutum vaguely brighter. Pleura dark hrown, very sparsely
pruinosc. Halteres pale, the knobs whitish. Legs dark brown. Wings
strongly infumed, the stigmal region scarcely darker; veins and macrotrichiae still darker brown. Venation: SCI ending opposite r; vein
2nd A relatively short, ending a short distance before m-cu.
.
Abdomen dark brownish black, including the hypopygium. Male
hypopygiwll with the outer dististyle bifid, the longest arm slender,
gently curved, the short arm flattened, thc apex truncated and gently
sinuous. Basal dististyle (Fig. 20) a short powerful chitinized rod that
tenllinates in a few strong spines; margin of style near midlength with asingle elevated tubercle that bears a short powerful seta.
IIolotype,d', Desierto
de los leones, altitude
3010-3080
meters, July 20, 1924 CA. M. Dampf); M. B. No. 73.
The two species of Molophilus described herewith are very
distinct from all allied regional species in the structure of themale hypopygium.
Erioptera Meigen.
Erioptera CVlesocyphona)inornatipes sp. n.

Gcneral coloration light brown, the praescutum with two conspicuous dark brown stripes; pleura with a grayish white longitudinal
stripe enclosed between two narrow brown vittae; legs uniformly

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parallel to 1st 11, ending opposite the basal portion of the petiole ofcell .11:1•.Ahdomen dark brown, including the hypopygium. Male hypopygiwll with the basistyle terminating in a minute compressed beak, theapex of which is acute. Outer dististyle elongate, curved, bifid, thelongest arm slender and strongly angulated near midlength, the shorterarm (lilated and squarely truncated at apex. Basal dististyle (Fig. 19)
a powerful, gently curved chitinized rod, gradually narrowed to theacute tip, the concave margin on basal half microscopically serrulate.

352

A nnals EntomologicalSociety of A merica[Vol. XVIII,

Holotype, if, Penon viejo, May 11, 1924 (A. M. Dampf);
M. B. No. 50. Allotopotype,<;;?
Paratopotypes,
18 if <;;? ;paratypes, Penon marquez,
1 if, March 13, 1924; M. B. :34;
5 if <;;?, March 5, 1924, M. B. Nos. 36, 37; 20 if <.;?, Desierto
de los leones, swampy meadow, January
25,1925; M. B. 114.
EriopterainornatiPes

species of the subgenus

is welldistinguished

from

the

MesocYPhona by the unornamented

alliedlegs.

Erioptera (Empeda) ochricauda sp. n.
Size .large (wing, if, over 7 mm.); general coloration dark brown,
variegated with yellowish; pleura striped longitudinally with brownand yellow; legs brownish black.
AI ale. Length about 5 mm.; wing, 7.2 mm.
Rostrum light ochreous; palpi infuscated.
Antennae with the scapal
segments paler than the dark brown flagellum; flagellar segments oval,
becoming more elongate outwardly, the verticils relatively short andinconspicuous.
Head light gray.

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brown; wings brown, spotted and dotted with white, the costal region
basad of the origin of Rs largely pale.
AI ale. Length, 3.3-3.5 mm.; wing, 4.2-4.4 mm.
Female.
Length, 4 mm.; wing, 5-5.2 mm.
Rostrum brown; palpi black
Antennae brown, the flagellwll alittle paler; flagellar segments oval. Head grayish brown.
Pronotwn brown, darker medially.
Mesonotal praescutwn lightbrown with two conspicuous dark brown stripes that are separated fromone another by a very slightly narrower median line of the ground-color;
extreme l:o.teral margin of sclerite narrowly dark brown; pseudosutural
foveae and tuberculate pits in transverse alignment, black; scutallobes
with their mesal edges blackened; scutellwn brown, broadly marginedwith ochreous; postnotwn gray. Pleura gray with two ill-defined,
narrow brown longitudinal stripes that enclose a dirty grayish whiteband that passes immediately beneath the root of the halter; sternopleurite grayish.
Halteres pale, the knobs dark brown. Legs with thecoxae and trochanters pale brown; remainder of legs brown, the femora
only vaguely darkened at their tips; terminal tarsal segments somewhat
darker in color. Wings (Fig. ] 0) brown, the costal margin darker, theremaining cells paler in color, the entire surface variegated with numerous whitish dots and spots, arranged in more or less contiguous toconfluent longitudinal rows in the cells, restricting the ground-color to areticulate pattern; costal region before the origin of Rs extensively
whitish cream color; a small spot before the posterior areulus darker
brown; the three larger brown costal blotches much wider than the palespots between; a pale band along the cord to CUI; veins brown, pale in
the whitish areas. Venation as in the subgenus.
Abdomen light grayish brown, including the hypopygiwn.
Ovipositor with the tergal valves yellowish horn-color, the sternal valvesdarker.

Alexander:

Crane-flies of :Mexico

Erioptera (Empeda)

alticola sp. n.
(~eneral coloration
gray; antennae
and legs black throughout;halteres pale, the knobs infuscated; wings tinged with brownish gray,the t'xtn:me base more yellowish.
J[ale.
Length about 4.8 mill.; wing, 6.2-6.3 mm.
Female.
Length about 4.4 mm.; wing, 5.8 mm.
Rostmlll dark gray; palpi black.
Antennae black throughout,thesegments with I(Ulg yertieils.
Head gray.
Prmwtulll broadly dark brown medially, the sides narrowly grayish.
:\feson\ltal ]lraescutwll dark brown, the sides of the sclerite fading into
light gray. only the "cry narrow pretergitcs and dorsopleural memhralll's a trifle huffy; posterior sclerites of mesonotw11 clear light gray.
Pknnl uniformly light gray.
Halteres pale, the knobs infuscated.
Legs with the coxae dark gray, the remainder of the legs black.
'Vingswit h n faint hr, 'wnish i-,>'1'aytinge, the oval stigma faintly indicated,pale hrown; wiug-hase und costal region a little marc yellowish; ,'eins
hnl\nl.

.\hllollll'll dar;.;: brown, including the hypopygium.
:l\Iale hypopygiulll
with the outer dististyle (Fig. :?:?) bifid, the shorter or mesal arm squarely

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Pr, ll10tUIll brown medially, the sides more yellowish; lateral pretl'f.~itl'~ l'llllSpicuously light yellow.
J\Iesonotum dark grayish brown,
tlw lateral margins of the praescutum
conspicuously
orange-yellow;
l'~l,tHl(lsutural fOYl~ae and tuberculatepits shiny brownish black;~eutellu1ll grayish brown, bordered posteriorly by obscure brownish
yellow.
Pleura ohscure yellow, longitudinallyvariegated with brown,
the Il}(\rc llorsal stripe including the fore coxa and the dorsal anepisterIlUIll; 'Tntnl
stripe including the sternop!curite
and meron, theptef(lpll'uritc
remaininglargely pale. Halteres
pale yellow.
Legswith the fon' coxae dark, the other coxae obscure yellow; trochanters
hrowllish yellow; remainder of legs brownish black, only the extreme
fellloral hases paler.
'Vings with a pale grayish tinge, the costal region
a littk darker; anal angle of wing weakly infuscated; veins brown;
Rs, JI awlts! .1 conspicuously paler. Venation:,)'Cl ending beyond
millll'ngth of Rs, ')'(2 some distance from its tip, SCI alone more than
one-half longer than /'-11/; /' about its own length beyond the fork of
Rs; ha~al deflection of Jlh+2 very short; 1Il-Clt near fork of M.
Ah(lomen dark brown, the stcrnitcs somewhat paler; hypopygiumochreous.
;\Iale hypopygiwn with the outer dististyle (Fig. 2 I) bifid,
the outer or longer arm relatively broad, parallel-sided, the apex obtuse;
the shorter or mesal arm broadest just beyond midlength,
thencesuddenly narrowed to a blunt point.
Inner dististyle gently expanded
distally.
IIolo!ype, d", Mt. Tlaloc, Pinus region, altitude about ;3700
meters. on 'wet rocks, June 1:>, 1924 (A. M. Dampf).
Eriop!rra
ochriCllltda is readily
distinguished
from
the
known
species of Empcda by the large size, striped
thoracicpleuraand other characters
as diagnosed.

354

AnnalsEntomologicalSociety of America[Vol. XVIII,

IIolotype, cJ', M t. Tlaloc, Pinus-region,
altitude 3000-3GOO
meters, June 15 1924 (A. M. Damp£).
Allotopotype,
Q,
Abies-region, altitude 2800-3200 meters, June 15, 1\)2-4:;M. B.
No. 67. Paratopotypes, 4 cJ' Q.
EriojJtera alticola is readily told from all described speciesof the subgenus by the comparatively
large size, nearly uniformly gray coloration and black antenn<e and legs.
Erioptera (Empeda) curta sp. n.

General coloration pale brown, variegated with yellow; head yellow,
the vertex variegated with brown; antennae pale at base; thoracic pleura
yellow, indistinctly striped with darker; wings with Sc short; malehypopygiml1 with an obtuse lobe in the axil of the arms of the outerdististyle.
M ale. Length about 4.4 mm.; wing, 4.7 mm.
Rostrum yellow; palpi brown. Antennae with the basal segment ofscape yellow, the second segment passing into brown; flagellum brown,
the segments short-oval, with verticils of moderate length. Headyellow, the center of the vertex infuscated.
Pronotum yellow, narrowly brown medially. Mesonotal praescutum pale brown, further divided by a dark brown median vitta that
becomes obsolete shortly beyond the pseudosutural foveae, the lateral
margins of the sclerite narrowly yellow; pseudosutural foveae shiny
chestnut-brown; scutum obscure brownish yellow, each lobe with two
confluent brown spots, the posterior mesal one smaller; scutellum yellow,
the median area at base weakly infuscated; postnotum weakly
infuscated. Pleura obscure yellow with two ill-defined darker longitudinal vittae, the more dorsal including the fore coxa and occupying
the anepisternum, the more ventral somewhat darker, including thesternopleurite and meron. Halteres pale, the knobs infuscated. Legs
with the fore coxae darkened, as described above, the other coxae pale;trochanters pale yellow; remainder of legs pale yellow, the terminal
segments passing into dark brown. Wings yellowish gray, the base,costal region and space between the branches of e1£ (as interpreted by
Tillyard) more yellowish; veins brown, more yellowish in the Bavous
areas. Venation (Fig. 11): Sc very short, SCI ending before one-third
the length of the short Rs, SC2 not far from its tip.
Abdomen dark brown, the caudal and cauda-lateral portions of
the basal segments more yellovvish,the latter increasing in amount on
the posterior segments, very extensive on the penultimate segment;
sternites yellowish; hypopygium pale. Male hypopygium with the outerdististyle (Fig. 23) bifid, the longest arm with a prominent basal wing or
flange that :s approximately rectangular in outline; the shorter curved
arm has a conspicuous obtuse lobe on the inside near base, this lobe
having approximately the same outline as the two arms.

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truncated and with the inner angle produced laterad into a point;
outer arm relatively slender and gently curved.

1025]

Alexander:

Crane-flies of ~Mexico355

Erioptera (Empeda) tridentata sp. n.

(~l'lll'ral coloration pale yellow; wings pale yellowish subhyaline,
the wins pale; male hypopygium with the outer dististyle bifid, themesal ann with a conspicuous group of three spines ncar its axil.
Jl ale. Length, 2.R:~ mm.; wing, 4.8 mm.
FOllale.
Length, :3.8 nun.; wing, ;'5.2 mm.
Rostmm pale yellow, the palpi a trifle darker. Antennae yellow,
the tcnninal segments passing into darker; flagellar segments of themale with relatively long vertici]s. Head pale yellow; vertex in themale Vl'fY narrow, in the female somewhat broader.
Pronotum pale yellow. :Mesonotalpraescutum and scutum with thedisk pale reddish yellow, the margins pale yellow; remainder of mesonotum pale yellow. Pleura yellowish white. Halteres pale throughout.
Legs pale yellow, only the terminal tarsal segments infuseated. Wings
vcry pale yellowish subhya]ine, the veins scarcely darker, inconspicuous.
Venation: .Iiel ending ncar midlength of Rs, .Iie! a little shorter than
1'-11/: r just before midlength of R2+~;veins R2 and R3 divergent; analveins strongly divergent.
Abdomen obscure yellow, including the hypopygium. Male hypopygium with the outer dististy]e (Fig. 24) profoundly bifld, the outerann longer, curved, the shorter mesal ann terminating in a broad
flattened blade with a conspicuous group of three spines on the inner
margin just beyond the base.
lIolotype,cl', Desierto de los leones, altitude 3010-3080
meters, July 20, Hl24 (A. M. Dampf); M. B. No. 73. Allotopotype, ~. Paratopot·ypcs, [)cl' « .
Erioptcra tridentata is readily distinguished from all described
species of Empeda by the uniformly pale yellow coloration andstructure of the male hypopygium.
Erioptera (Empeda) unidentata sp. n.
Male.
Length about :3.4 mm.; wing about 3.8 mm.
Closely related to R. (R.) tridclltata sp. n., from which it differs inslight details of coloration and the structure of the male hypopygium.
Rostrum obscure yellow; palpi infuscated. Antennae with thescapal segments yellowish testaceous, the flagellum brown; flagellar
segments with long vertici]s. Head clear light gray.
)'lesonotum light reddish brown, the praescutum with a vague
dusky median line on the anterior half, this becoming obsolete at the
tuberculate pits, the latter black; pseudosutural foveae pale. P]cura

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lIolotypc,cl', Chapingo, August 13, 1924 (A. M. Dampf);
M. F. ~!H.
ErioPlcra Cllrta is readily distinguished from all described
species of the subgenus by the short sub costa and the structureof the male hypopygium.

356

A nnals Entomological Society of America[Vol. XVII!.,

Holotype,
meters,Julyd", Desierto
de los leones,
altitude20, 1924 (A. M. Dampf);
M. B. No. 73.

3010-3080

Tipula Linna'ius.

Tipula moctezumre sp. n.

.
General coloration gray, the praescutum with four uniformly darkbrown stripes; antennae
short, the basal segment of the flag-cllum
very long; abdominal tergites obscure yellow, striped longitudinallywith dark brown; ninth tergite broad, pale; inner dististyle divided into
two blackened arms.
Male.
Length, 14-15 mm.; wing, 18.5-19.5 mm.
Frontalprolongationof head obscure brownish yellow, darker
medially above; nasus moderately
long, dark; palpi dark brown.
Antennae short, scape and first segment of flagelltrm orange; intermediate
flagellar seg:21ents indistinctly bicolorous, dull orange, the basal enlargement of each darker, the terminal flagellar segments passing into uniform
dark brown; first flagellar segment very long, exceeding in length the
combined following three segments; basal swellings of intermediate
flagellar segments relatively small and inconspicuous.
Head gray, thesmall vertical tubercle a trifle more yellowish.
Mesonotal praescutum
dark gray with four uniform dark brown
stripes, the intermediate pair rather broadly separated from one another;scutum dark gray, each lobe with t.wo separate brown areas; scutellum
gray with an indistinct brown median line; postnotum gray.
Pleurabrownish gray, indistinctly
variegatedwith darker areas.
IIalterespale, the knobs infuscated.
Legs long and slender, the coxae brownish
gray; trochantersbrownish yellow; femora brownish black, the bases
indistinctly
and restrictedly
paler, the tips blackened, the segmentswith a more or less distinct subterminal
paler ring, more distinct on
the posterior legs; tibiae dark brown, the tips and the tarsi blackened.
Wings with the center of the disk whitish subhyaline, the base andcostal region more yellmvish, the apical and anal cells weakly infuscated,
the stigma small, ill-defined and only slightly darker than the groundcolor; the pale areas occupy most of cells R and .v, the broad bases of
the anal cells, cellist }J2, all of R5 except the base and the base of eellM3; a rather broad and conspicuous brown seam occupies the distal
half of vein CUI, slightly narrower on 11l-CU; veins dark brown, more

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pale reddish brown.
Halteres pale, the knobs weakly infuscatcd.
Legs
vvith the coxae pale, the fore coxae extensively infuscated; trochanters
pale; legs largely pale, the fore femora darker; tarsi passing into brown.
Wings tinged with grayish, the base and costal region more yellowish;
veins pale. Venation:
r on R2+3 only a trifle more than its length
beyond thc origin.
Abdomen pale brown, the hypopygium
paler.
Male hypopygiumwith the outer dististyle (Fig. 25) bifid, the shorter mesal arm bearing asingle powerful spine just before midlength.
In the related E. (E.)
nif!.rolineata (Endcrlein), there is a similar solitary spine, which, however,is borne in the axil of the two arms.

Alexa/zder:

Crane-flies of Mexico

IIolotype, d", M t. Tlaloc, Pinus-region, altitude 3000- 3GOO
meters, June 15, H)24 (A. M. Dampf); M. B. No. 63. Paratopotypcs, 5 d" d", M. B. Nos. 63, G7.
Tipula 1110ctezUm(eis readily distinguished from all similar
rl'gional forms by the very long third antennal segment and thepeculiar structure of the hypopygium.
Tipula azteca sp. n.
General coloration gray, the praeseutum with the latera] stripes
nearly obsolete; antennae moderately elongate, flagellum black; malehypopy~ium without a median liguliform lobe on eighth sternite.
Male.
Length about 12-12.5 mm.; wing, 14-15 mm.
Frontal prolongation of head relatively elongate, brown, the dorsum,
including the long nasus, gray; palpi with basal segment pale brown, therl'lllainder brownish black. Antennae of moderate length, if bent
backward extending approximately to the base of the abdomen; basal
sC'gmentdark brown, the second segment conspicuously yellow; flagellum
black, the segments moderately incised. Head light gray, the small,
t'illljlleyertical tubercle more yellowish.
:!\Iet'onotalpraescutum gray, more infuseated anteriorly and laterally,
with the usual brown stripes often very feebly indicated, especiallythe lateral pair, which are virtually obsolete; intennediate pair darker,
hrna(lencd and confluent in front, strongly narrowed behind, not attaining the suture; scutum light gray, each lobe with a large trianj..,'1.l1ar
darh'r gray marking; scutellum light gray; postnotwn yellowish gray.
Pleura l-.rray,the dorso-pleural membrane more brownish. Haltcres
dungate, pale yellow, the knobs infuseated. Legs with the coxae light
gray; trochanters obscure orange; remainder of legs black, the extreme

Downloaded from https://academic.oup.com/aesa/article-abstract/18/3/341/27203 by ESA Member Access user on 25 May 2020yell(l\\"i~hin the flavous areas. Venation: R2 complete, but the distalt\\"o-thirds palc and without macrotrichiae; petiole of cell 11h variable,
eq~l<.llto or shorter than 111; 11I-CU connecting with 11I4 shortly beyond its
onglll.
Ab(lominul tergites obscure yellow with a narrow dark brown
median and two broader lateral stripes that widen out behind, on the
fourth awl succeeding segments gradually eliminating the ground-color,the subtcnninal sel-.'lnentsuniformly darkened, pruinose; basal sternites
yellow, the subtenninal segments darkened; hypopygium pale. Eighthsternitc produced medially into a small flattened ligulifonn lobe thatlies closely appressed to the ninth sternite. Male hypopygium with thenint h tcrgite (Fig. 26) broad, notched medially, the lateral angles
pro(]ueed caudad into rather broad obtuse lobes. Tergite entirely
separate from the sternite; basistyle virtually complete. Outer dististyk pale, more or less constricted near mid]ength. Inner dististyledecply di,"ided into an inner and a slightly smaller outer arm, each being
spatulatdy dilated and blackened distally; the outer dististyle lies far
vcntrad ncar the ventral portion of the basistyle, its usual dorsal position
being occupied by the outer chitinized arm of the inner style.

358

A nnals EntomologicalSociety of A merica[Vol. XVIII,

IIolotype, d', Mt. Tlaloc, summit, at nearly 4000 meters;
treeless, with grass and creeping Cupressus between the rocks,
June 15, 1024, (A. M. Dampf); M. B. No. 64. Paratopotypes,

2 d'd'.
Tipula. azteca is unquestionably
closely related to T. moctein the peculiar structureof the hypopygium,
differing
most evidently in the small size, length and structure of theantennae and the details of the hypopygium.

zum(£

N ephrotoma Meigen.
Nephrotoma dampfi sp. n.
General coloration yellow; mesonotal praescutum with three confluent shiny black stripes; head with the occipital brand very extensive,
steel-gray, narrowly margined with velvet-black; a small black spot
adjoining eye at narrowest part of vertex; abdomen orange-yellow, thetergum with a continuous black median stripe.
Male. Length, 8-9 mm.; wing, 9.5-11.2 mm.
Frontal prolongation of head pale yellow, the dorswn narrowly
dark brown, the nasus concolorous; palpi brownish black. Antennae
black throughout; flagellar segments only moderately incised. Headorange, passing into yellow on the genae and beneath; occipital brandvery large, covering most of the vertex, shiny steel-gray, narrowly
margined with velvety black, the latter continued cephalad as a small
median spur onto the orange, slightly bifid vertical tubercle; a small but
conspicuous black spot on either side of the vertex at the narrowest
point, touching the margin of the eye.

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femoral bases indistinctly paler. Wings extensively whitish subhyaline,
the base and cells C and Sc conspicuously yellow; faint brown clouds
include most of cells 1st R!, 2nd R!, R2 and R3; faint and restrictedmarginal clouds in cells M1 to M4; a conspicuous triangular cloud in endof cell 1st A at about mid-distance between the anal veins, extending
basad for about one-third the length of the cell; veins narrowly seamedwith brown, broader and more conspicuous on the distal half of CUI.
Venation: R2 entire, quite without macrotrichiae; vein 1st A runningparallel with CZt2 for its basal third, thence diverging gradually to themargin, celli st A thus being very wide.
Basal abdominal tergites obscure yellow, with a narrow mediandark brown stripe and broader paler brown lateral stripes, the latteron the third and succeeding segments broadening out to include theentire segments; sternites beyond the extreme base infuscated; hypopygium pale. Male hypopygium very similar in structure to that ofT. l1wclezuma sp. n., differing as follows: 9th tergite without thesmaller median U-shaped notch, there being only a linear split; laterallobes more obliquely truncated.
Eighth sternite without medianligulifonn lobe.

1925]

Alexander:

Crane-flies of Mexico

359

IIolotype, d", Mt. Tlaloc, Pinus-region,
altitude 3000-3600!1ll'ters. June 15, H)2-!(A. M. Dampf); M. B. No. 63. Paratopotypes. 1:2 if' d"; M. B. Nos. 63, 69.
Xeplzrotonza dampji is named in honor of Dr. Dampf, whocollected the types on Mt. Tlaloc.
This very distinct fly is
H>adily distinguishedfrom other species by the small size,
curious head pattern and confluent praescutal stripes.

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Pn\11(1tumlight yellow, the pleura extensively dark brown. Mesonotal praescuttull yellow, the dorsum with three confluent shiny black orf,rray-black stripes, the anterior lateral margins with a small opaquehlack spot: a small black spot on lateral margin of praescutum justcephalad of suture; scutum yellow, each lobe largely occupied by ashiny gray-black stripe that extends obliquely across the lobe, the mesal
margins parallel; scutellum pale brownish with a narrow median black"itta; pest notal mediotergite yellow with a .i-shaped brown marking.
Pll'ura sulphur-yellow, variegated with black, the most conspicuous
markings consisting of two short longitudinal stripes occupying theane]listl'mum and sternopleuritc, divided by a yellow stripe; meron
restrictedly blackened; a linear black streak immediately cephalad ofl'ach halter on the postnotal pleurotergite.
Halteres brown, the base of
tlll' stl'm paler, the knobs extensively pale sulphur-yellow.
Legs withcoxal' yellO\Y,the fore coxae e;dcnsivcly darkened basally; trochantersoran).2t'-yl'1IO\y;remainder of legs black, the femoral bases nalTowly
pall' brown. '''ings subhyaline, cells C and Sc more yellowish; outer
elHls of marginal radial cells faintly darkened; stigma oval, brown.
\'enation (Fig. 12): SC2 ending opposite origin of RSj 1/t-Clt oblique,connecting with J[ some distance before its fork.
.Abdominal tergites orange-yellow, with a continuous median black
stripe extending to the ninth tergite, broadening out behind; sternites
eoneolorous, with a dark spot laterally at base; base of eighth sternite
extensively blackened basally; hypopygium pale. Eighth sternite
notched medially, the margins of the notch fringed with conspicuous
yellow setae. :\Iale hypopygium with the ninth tergite deeply notchedl'audally.

360

A nnals Entomological Society of A merica

OF FIGURES.

Symbols: Venational: Cu-Cubitus; M--Media; R-Radius; A-Anal. Hypopygial: a-aEdeagus; b-basistyle;d-dorsal dististyle; g-gonapophyse; t-ninth
tergite; v-ventral dististyle.
PLATEXXIV.
1. Wing of Dicranomyia prrepostera sp. n.
Fig. 2. Wing of D. ravida sp. n.
Fig. 3. Wing of D. tricornis sp. n.
Fig. 4. Wing of D. filicauda sp. n.
Fig. 5. Wing of D. melanocera sp. n.
Fig. 6. Wing of D. damPfi sp. n.
Fig. 7. Wing of Limonia obtusistylus sp. n.
Fig. 8. Wing of ElePhantomyia allicola sp. n.
Fig. 9. Wing of Gonomyia tuberculala sp. n.
Fig. 10. Wing of Erioptera inornatipes sp. n.
Fig. 11. Wing of E. curia sp. n.
Fig. 12. Wing of Nephrotoma dampfi sp. n.

Fig.

PLATEXXV.
Fig. 13. Male hypopygium of Dicranomyia prcepostera sp. n.
Fig. 14. Male hypopygium of D. ravida sp. n.
Fig. 15. Male hypopygium of D. tricornis sp. n.
Fig. 16. Male hypopygium of D. melanocera sp. n.
Fig. 17. Male hypopygium of Limonia obtusistylus sp. n.
Fig. 18. Male hypopygium of Gonomyia tuberculata sp. n.
Fig. 19. Basal dististyle of Molophillls severus sp. n.
Fig. 20. Basal dististyle of M. paucispinosus sp. n.
Fig. 21. Outer dististyle of Erioptera ochricauda sp. n.
Fig. 22. Outer dististyle of E. alticola sp. n.
Fig. 23. Outer dististyle of E. curta sp. n.
Fig. 24. Outer dististyle of E. Iridentata sp. n.
Fig. 25. Outer dististyle of E. unidentata sp. n.
Fig. 26. Ninth tergite of TiPula moctezumae sp .n.

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EXPLANATION[VoL XVIII,~

Fig. 5--'-~~Charles P. Alexallder

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Fig. 7

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PLATE XXIV
VOL. XVIII,
A:-l",\LS E. S. A

ANNALS E. S. A.

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PLATE XXV

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Fig. 21
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VOL. XVIII,