^ \-L./V

STIIDIES ON THE CRANE-FLIES OF MEXICO.
PART IV.*(Order Diptera, Superfamily Tipuloidea).
Cnenr,ssP. Ar,exenorn,
Amherst, Massachusetts.

In the present paper, I wish to discuss additional speciesof
crane-flies that were taken in various parts of l\{exico by Dr.
Alfons Dpmpf, Government Entomologist. A very considerable
proportion of the species were taken in the State of Chiapas,
under conditions that have been discussedin general terms in
the preceding part under this same title (Annals Ent. Soc.
America,20:301-318;1927). A few additional localitiesrequire
specialexplanation:
Nayarit: Near Tepic, Nayarit, altitude 945 meters, swept
from shrubs and bushes on shores of swift-flowing rivulet,
March, L927. M. B. 203. Geranomyia (Geranomy,ia)perfecta
sp.n.
Rio Mo,ys; Near Navojoa, Sonora, March, 1927. M. F.
1221. Cryptolabis (Cryptolabis)fuscoaenosasp. n.
Desierto de los Leones: Near Mexico City, altitude 3,100
meters, in Abies forest, srvept from along a swift-flowing
aqueduct, March, 1925. I,I. B. 116. Shannonomyia rnoctezuma sp. n. This locality has been discussedin greater detailin an earlier part of this series of papers (Annals Ent. Soc.
America, 18:341-362; 1925).
In this paper, and others prepared subsequently to 1926, I
have adopted the interpretation of the radial field of the wingthat has been discussed in detail in other papers (Proc. Linn.
Soc. New South Wales, 52:42-72,92 figs.; lg27; Rec. IndianMuseum, 29:167-214,plate; 1927). Several Australasian Entomologists, especially Drs. Mackerras, Tillyard and Tonnoir,
have considered that the interpretation as given was tooconservative in that it was not applied to all of the subfamilies
and. tribes of the family. I now consider that this emendation is advisable and by applying the following changes to the* Contribution from the Entomological Laboratory of the Massachusetts
Agricultural College.

r0l

I

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Annals Entomolog,ical
Societyof America [Vol. XXI,

Tipuline, cylindrotomine, and the tribes Limoniini andLechriini, aII groups within the family arebrought into harmony:First section of Rr : Sc2-.R1.
Distal sectionof Rr: Scz(free tip).
r: Rt.
Rz: Rr+2.
As before, I wish to express my deepest thanks to Dr.
Dampf for the privilege of studying these extensive series ofTipulide and of retaining the types of the novelties herein
described.

Tipula Linnaeus.
Tipula zeltalesp.n.
Belongs to the moctezum@
grolrp; antennre (cr) of moderate length,l3-segmentgd,bicolorous; wings strongly tinged with brown, variegatedwith conspicuouswhitish spots.
Male. Length, about 16 mm.; wing, 79-20mm.
Female. Length, about 26-3Lmm.; n'ing, lg-22 mm.
F rontal prolongation of head relatively long, dark chestnut-bron'nlaterally, the dorsum dusted with yeilon'; nasus long and slender; palpi
black. Antenne (a) of moderate length, if bent backward extending
about to the base of the abdomen; scape and first flagellar segment
yellow; remaining flagellar segmentsbicolorous, the basal enlargement
black, the remainder of the segment yellorv, on the outer segrlehts thecoloration passing through brownish yeilorv to brown; first flagellar
segmentof moderatelength only, subequalto the first scapal;remaining
flagellar segments increasing in length and decreasingin diameteroutrvardly; terminal segmentvery srna1l,elongate-conical;antenne ( g )shorter and the bicolorous nature poorly indicated. Front yellow, thevertex dark brown, the posterior orbits more yellowish.
Pronotum brorvn. Mesonotal praescutum dark brown, the usual
four brown stripes entire and but little different in color from theinterspaces,the whole surface dusted n'ith a sparsepollen, the lateral
margins more broadly so, the humeral region darker brorvn; in theparatype female the stripes are very distinct, brownish black, theinterspaces golden-yellow; scutum dark brorvn, the posterior portions
more pruinose; scutellum and postnotum dark, gray pruinose, n'ith acapillary brown median vitta. Pleura dark, indistinctly variegatedwith paler, the surface dusted with brown and gray; dorso-pleural
membrane buffy brown. Halteres long, yellow, the knobs infuscated.
Legs with the coxe dark, pruinose; trochanters obscure brorvnish
yellow; remainder of legs very long and slender, the femora brownish
yellow, brighter basally, the tips narrowly but conspicuouslyblackened;tibire yellowish brown, the tips even more narrowly dark brown; tarsi
dark brownl basitarsi longer than the tibie. Wings strongly tinged
with brown, the base and costal region more yellowish brown; stigma
rather ill-delimited, pale brown; conspicuouswhitish areas before the1e281

Alexander: Mexican Cranefl.ies

103

cord,.near outer end of cell M and in the bases of cells M, lst A and,?nd A,'antestigmal and poststigrnalregions more creamy-white; veins$ark brown, fr*paler; obliterative aieas extensive. Venation: R,+z
long, e3tir9, cell.Rzd":pi cell.Mr.veryg."p, the petiole greatly t.a"..dim-clt-b_asalsection of.Ms and m in obliqu-e'sinuousaligimen[.
Abdominal tergites yellow, passing into brownisf, yellow on theoutel se€ments, trivitate r,vith black, the stripes trarrowiy intermptedat the incisures; sternites similar, with a conspicuous median black
longitudinal line., th_eouter segments more unifoimly darkened. Male
hypopygium as in the moctezumegroup; ninth tergiie large, the caudal
margin with a broad, rectangulainot-ch, the med-ianare?'of which isgently ploduc_edand-again iplit^.iiny median V-shaped "oa.h;lateral lobes flattened, t-h"-tips Fy-obiusely iounded. The c^onspicuoul
outer dististyle lies caudad oi the inner, narrow at base, expanded^intooutwardly, _the caudal portion of the apex further extended;
triangular lobe. ovipositor with the varves very long and stt"Gni,the margins smooth.
HolotyPe,d,near Grutadel Elcanto,

chiapas,in pineforest,altitude about 2,200meters,June 6, 1926(A. M. Dampf).
AllotopotyPe,g, with the type. Paratopotype,d, M. B. iOi;
paratypes,Q, San Cristobal,July 12, 1926,M. F. 1,030;1 g,
June4,1926,M. B. 160;1 g, summit of the Hueitepec,altitud.e
2,600meters,June 14, 1926,M. F. gZL.
The specificname is that of a Maya tribe of chiapas.
Tipula zotzilsp.n.
l[ole.- Length about l6 tnrrr.;u'ing, l8 nrrrr.; antennaabout g.j mrn.
I-'emale. Length abotit ')2 rtrnr.;n'irrg. l8.i n-rnr.
._ Belongs to the monilil't'rusr(lll); allied to T. mifua Alexancler(Colombia),from rvhich ii tiiffers nt fnllor.-r:
Antenne a little lorrger in proportion to the length of the body.
Frontal prolongation of hgad dark brorvn laterall"y, conspicu;;ityellow above. Antenne rvith the scape atrq first flagellar^segment
yellow; secondflagellar segmentrvith the stem brownish feilorv; remainilf flagellar segments with the stem passing from dark broun into
!1".\, concolorous with the basal node. The head and thorax are
discolored and their coloration cannot be well compared. pleura
1'ellow... Wings much as in mitua, the white areas more restricted,
the_oblique white band across cells R and tr,I verv narrow and thesubbasalwhite areas in the same cells merely indicited; basal half ofvein R1a2dqrk brown, the distal half.abruptly-pale. Male hvpopvsiurniarge,_theqt-"th tergite black on the sides,lheciudal margin and medianarea. broadly yellow; tergite narrowed apically, the iaudal margin
gently rounded, almost as in mitua.
Dististyle light yellow, conspicuous. Median area of the eighth sternite a iorv blunt-lob" that it
only about as long as the width at base, the apex obtuse, tufted withgolden-yeilorvsete that are longer than the lobe itself.

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Annals EntomologicalSoc'ietyof Arnerica [Vol. XXI,

IfobQpe, & , Hueitepec, Chiapas, in dense leafy \Moods,
altitude 2,600meters,June 14, 1926(A. M. Dampf); M. ts. 170.
Allotype, 9 , San Cristobal, in midst of meadows,swept fromhangingbranchesof willowsnear rivulet, Joly 3,1926; M. B. 183.
The specificname is that of a native Indian tribe of Chiapas.
The monilifera group and its included specieshas been discussed
in an earlier paper by the writer (Trans. Amer. Ent. Soc.,42:
23-30,pls. 3-5; 1916). T. zotzil is the most northern speciesso
far discovered. Osten Sacken (Biol. Centr.-Amer., Dipt. 1:
I3; 1886)refersspecimensfrom Irazu, Costa Rica, to monilifera,with a question.
Dicranomyia

Stephens.

Dicranomyia onerosa sp. n.
Similar to D. Iiberta O. S.; general coloration gray; antennre black
wings strongly tinged with duskl', the small stigma darker;
throughout;-hypopygiumwith the rostral prolongation of the 'u'eutral distimale
style stout, bearing a single spine rvhich arises from an enlarged basal
papilla.
- Male. Length about 5.3-5.5 mm.; wing, 7.4 mm.
Very similai in general appearance to the Nearctic D. liberta Osten
Sacken, differing notably in the structure of the male hyp9p"vg1_um:
Rostrum, palpi and antenna black, the flagellar segments oval. Headand thorai brou'nish gral', the praescutal stripes and centers of the
scutal' lobes darker. Halteres pa1e, the knobs dark llrotl'n. Legs
dark bror,vn,the tips of the femora broadll' blackenecl, the tibia morenarrowly so; tarsi brownish black. \\'irlgs strongll' suffused withdusky, the small, ill-delimited stigma darker brotl'n; .vague darker
seaml-along the cord and outer end of cell lst tr[z; obliterative areas
consplcuous, rncluding part of rn-cu. Venatio-n: Sc short, Sct_en_dingshorily beyond the origin of Rs, Sc1 not far flom the tip and about
opposite the origin of Rs,' tn-cu varying in position from some distanceb-eforeto opposite the fork of lr'. In the right wing of the tvpe, cell
Mzis open by the atrophy of the outer deflection of.Ma.
Abdomen, including the hypopygium, dark brown. N{ale h1'pop1'gium with the rostral prolongation of the ventral dististl.le stout, near
midlength bearing a single conspicuous spine which arises from aswollen papilla.

Ilolotype, d', San Cristobal, Chiapas, altitude 2,100 meters,
July L2, 1926 (A. M. Dampf); M. F. 1,030. Paratopotype, d .
Dicranomyia ingrata sp. n.
Male. Length about 5.5 mm.; wing, 7.6 mm.
Female. Length about 6 mm.; wing, 7.5 mm.

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Alexand,er: Mexican Craneflies

105

Praescutal stripes. brown, the lateral stripes poorly delimited.
L^egs*i!h- th-efemora light brown, the tips broadly blackened;remainderoJ legs black. Wings almost exactly as in onerosa,with Rs a little
shorter. Abdomen with the hypopygium dark brown. N,Ialehypopygium with the_margin of the nintilergite
evenly convex, nof it^ittemarginate. Ventral dististyle.relatively small, the rostral prolongation
broad, with two spines,thesearising from small, equal, elevatedtublrcles
that are separated from one another by a distince a little less than
the width of one; spines of moderate length, subequal, acutely pointed.
Dorsal dististyle a stro-ngly.curved sickle-shapedrod, the iong apex
very slender a1_dlgutely pointed; basal portion stouter, narrower at
midlength, a trifle dilated before the long apical portion. Gonapophyses
with the mesal apical angle long, slender, gen1ly curved, the iat-eralmargin microscopically roughened.
Holotype, d, Cerro San Cristobal, Chiapas, on low herbage,

Jtrne 29, 1926 (A. N{. Dampf); M. B. 182. Allotype, 9, San
Cristobal, altitude 2,100meters,at light, Jaly 12, 1926;M. F..
1,030.
Dicranomyiasubravidasp.n.
Generally similar to D. ravida Alexander; antenne black throughout; rostral prolongation of .the ventral dististyle of the male hypopygium_with two sybequal spines that are direcled strongly basad.
ilIale. Length about 5 mm.; wing, 5-5.b mrn.
Female. Length about 5-5.5 mm.; r,ving,O-0.5mm.
Rostrum brownish yellow,_the palpi black. Antennre black throughout, the firs.t segment sparsely pruinose; flagellar segmentsshort-ov:al,decreasing in size outu'ardlr'. Head gray,- the vertex more or lesi
darkened, the posterior orbits clear.
Vlesonotum yellorvish grar', the praescutum rvith three dark brown
stripes, the media.n. stripe_broad, the laterals sornetimes obsolete,sometimes more distinct. Pleura gra]'. Halteres .vellolv,the knobs
infuscated. 1,egl with the coxe pale, the fore coirc infuscated, theremaining coxp infuscated only at bases; trochanters yellow; femora
dark brown, the bases narrorvll' obscure yellow; tibire brown,'the tips
narrowly dark brorvn.; outer tirTl segments brownish black Wil;;
hyaline, the oval stigma pale brown; veins brown. Venation: 5t
relatively short, S-crending.some distance before the origin of Rs, Sc2
far from the tip of Sc_1,
the_latter alone about equal to m--cu;Rs short,
subequal or shorter than the basal section of Ra..,.5,
strongly arcuatedto-feebly angulated;-cell 1st fufz closed;,?.cu at or before the-fork of.M,
subequal to or a little shorter than the distal section of.Cut.
Abdomen d?-.k bro_wn,the surface pruinose; ventral dististyle ofhypopygium yellow. Male hypopygium with the ninth tergite nearlytransverse across the caudal margin, the lateral lobes very low, eachwith a group of about ten sete; a median group of about seven seta.
Generally_similar to D. onerosaSp.n., differing especially in the
structure of the male hypopygium.

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of America [vol. xxl,
soc,iety
AnnalsEntomological

Basistyle relatively small, the ventro-mesal lobe larg-e. _Ventral disti,tyt" llrge and fleihy, the rostral prolongation broadly flattened, witht#o subEqual spines that are directed strongly basad. -Dorsal distiityi" gentiy cur',ted, sinuous. Gonapophysesv-ery broad, the caudomesal"angle produced into a relatively slender lobe'

Holotype,d, San Cristobal,Chiapas,altitude 2,100meters,
July 12, lgZO (A. M. Dampf); M" B. 188. AllotopotvPe,I ;20 d I , June 9-Ju1y 23, 1926;
Vt.- g. 183. Paratopotypes,
M . B . N o s .1 6 3 ,1 6 4 ,1 6 5 ,1 6 6 ,1 7 3 , 1 7 9 , 1 8 31,8 5 ,1 8 E ,1 9 3 ,1 9 4 ;M. 3'. Nos. 973, 1,005,1,006,1,007,1,008,1,015,1,021and
1,031.
Geranomyia HalidaY.
GeranomyiaPentheressP.n.

Related to G. canadensisWestwood; legs uniformly brorvnish black;wings with a strong dusky suffu_sion,the oval stigma darker plowf;
aUdi11itral tergites iniformly dark brown; male hypopygium with therpi".r of the iostral prolongation of the ventral dististyle very long,clrved, arising from a single conspicuous.tubercle'
Aite. Le"ngth (excludlng rostrum) about 5 mm.; rving, 6.8 mm.;rostrum about 4 mm.
Rostrum elongate,black, the palpi concolorous. Antennre brownish
black throughout"; flagellar'segmenti oval or the outer apical angles alittle produced. Head dark gr?Y: M'esonotal praescutum ieaaisn brown, . the median stripe more
plu-beous, indi'catedposteriorly ; humeral region of_praescujumbrighter ;icutal lobes dark plgmbeous: scuteilurn rlore brownish testaceous;ptittrotn-,
including the pleurotergite, piumbeous graY. Pleura|bi..tr" brownish yelibw. Hilteres dark brown, the base of the stem
narrowly pale. L-egsrvith the coxe and trochanters testaceous; remaindei oi th" legs"brownish black, the femoral bases only narroyly
Wings with a strong dusky su-ffusion,Lh. or,'al strgma darker;i";[ioiu", "on.[i.oous; veins stitt dart<erbrorryn. Venation: Sc relatively
lo.rg, Scr extendingio midlength of Rs, Sc2-not.farfrgm its tip; Rs.iongR, frresent butnery short, -Sczthus- lying- just proxirnad"rd'stttight;
oi nr; celT-lsl lZz^closed; nx-cushortly before the fork of. trI ; cell ?nd A
narrow.
relatively
AUa6-inal tergites dark brorvn, the basal sternites nlore yellowish.
Mai" hypopygium"with the tergite. deeply emargin-at-9,lh" conspic-uousvery large
dististyle
Ventralseta.
lateral iot .i denselyset rn'ithspinous
a"d fl"thy, the rosiral prolongation short, w!!h a very la-rgeand conthis_longrpi-"on. fi6shy tubercle occupying about all of its outer surfac_e,
lying
lattertheseboth of theiottgtu.ued rostral spines,
iin.i.f" bearing"andsubequal in length, approlimately -as 19nSas thelogether;i;ao.ot aittistyle. Dorsal^dirtirtyl" acurvedlickle-shaped rod, narrorved""rig."aua1iy to the obtuse ?p6x. Gonapophyseswith the mesal lobes
elongite, the apex producedinto a weak spinouspoint.

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Alexander: Mexican Cranefl.ies

107

Holotype, &, near San Cristobal, Chiapas, in the shadowy
ravine of a mountain brook, July 17, 1926 (A. M. Dampf) ;M. B. 190a. Paratopotype,&.
Geranomyia
turbidasp.n.
Related to G. canadensisWestrvood; mesonotal praescutum yellow
with scarcelvevident fulr'ous stripes; pleura yellow; legs with the femora
dark brown, the tips narrorvly obscure yellow; wings with a yellowish
brorvn suffusion, the oval stigma darker brown; abdominal tergites
darker brou'n; male hypopygium with the ventral dististyle very large
and fleshy, the rostral prolongation short, rvith two short straight spines.
IIale. Length (excludingrostrum) about 6-6.4rnnl.',wing, 7-8 mm.;rostrum about 3.5-4 mm.
Rostrum relatively elongate,brou'nishblack, paler basally. Antenna
brownish black throughout; flagellar segments oval. Head above
brorvnish gray, the vertex with a vague darker median line; anteriorvertex relatively wide.
Mesonotal praescutum light vellow, with scarcely evident fulvous
stripes; scutum yellorv, the centers of the lobes darker; scutellum
clearer yellow; postnotum rnore infuscated. Pieura yellowish. Halteres
relatively short, dark brown, the base of the stem narrowly yellow.
Legs rvith the coxe and trochanters obscure yellorv; femora dark brown,a trifle paler basally, the tip narrowly but rather conspicuously libht
yellow; tibire brownish black, the tips and the tarsal segments a little
paler. Wings rvith a bright yellowish brown suffusion, the oval stigma
darker; r-eir-rs
dar brorvn. Venation: Sc long, Scr ending about opposite
trvo-thirds the length of Rs, Scgclose to its tip; free tip of Sc2some
distance before R:, Rr thus being relativelv elongate; cell lst Mz
rectangular, gently rvidenedoutu'ardlr'; nt-cu not far frorn the fork ofM,longer than the distal section of Cut.
Abdominal tergites dark brorvn, the sides paler; sternites moretestaceous yellow; hypopygium dark. Ilale hvpop_v*giumwith thecaudal margin of the ninth tergite only gently ernarginate, the laterallobes broad. Ventral dististyle very large and fleshy, elongate; rostralprolongation short and stout, provided with two short, straight spinesof which the outer one is a trifle shorter; the spines are placed close
together near the base of the prolongation, not arising from enlarged
basal swellings as in related species. Dorsal dististyle pale, gently
curved, the tip abruptly narrorved to an acute point.

Holotype, d, near San Cristobal, Chiapas,in shadedravineof mountain brook, altitude about 2,200 meters, Jaly 17, L926
(A. M. Dampf); M. B. 190a. Paratopotypes,
3 d d, July 15,
1926;N'I.B. 190; July 17, L926;NI. B. 190a.
Geranomyiaeurygrammasp. n.
Antenne black throughout; mesonotal praescutum light green, witha broad dark brown median stripe and less evident orange-brown

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Societyof America [Vol. XXI,
AnnaJsEntomologicallateral stripes; wings yellowish, with an extensive brown pattern;
Sc short; male hypopygium with the spinesof the rostral prolongationof the ventral dististyle unequal, arising from conspicuous tumidbases.
Male. Length (excluding rostrum) about 6-6.5 nlm.; rving, 6.57 mm.; rostrum about 2.9 mm.
Female. Length (excluding rostrum) about 7.5-8 mm.; wing,
7.8 mm.; rostrum about 3.2-3.5 mm.
Rostrum relatively long, black, in the male a little less than onehalf the length of the body; palpi black. Antenna black throughout;flagellar segments elongate-oval. Head brownish graY, the vertex
with a narrow median light gray vitta.
Mesonotal praescutum light green with a very broad, dark brown
median stripe and less evident orange-brown sublateral stripes, thebroad lateral margins remaining of the ground-color; scutum pale, thecenters of the lobes extensively dark brown; scutellum green; postnotum pale brown, with greenish reflections. Pleura paie reddish or
testaceous bfo\4'n, with green reflections. Halteres short, pale, theknobs dark brown. Legs ','r'ith the cox& pale, tinged with green;trochanters pale yellow; femora light brown, the tips broadly. yellow,
preceded bf a subequal darker brown annulus; in cases, this latteriing is preCededby " broader but more diffuse obscure yellow__ring;tibi-€ and tarsi brown, the terminal tarsal segments darker. Wings
with a yellowish tinge, cell Sc more strongly so; an extensive darker
patterni arranged ai follo'ws: A series of about four darker brown
ireas along the costa, the first just be1'ondh., the secondat the supelnumerary crossvein,the third at origin of Rs and errd of Sc, the fourth
the stigmal area; cord and outer end of cel11st J[z broadll' seamedwith
paler brown; pale brorvn marginal clouds at ends of veins Rs,Cu1 andi"ry extensiv-elyon both Anal I'eins; r-eins 1'ellorv, brolvn in theinfuscated ateai. Venation: Scr ending a short distance beyond theorigin of Rs, Scznear its tip and likewise beyon4 Rt,' a supernumefary
croisvein in cell Sc,' Rs feebly angulated at origin; /n-cn,at fork of.M;
cell ?nd.,{ broad.
Abdominal tergites brown, the sternites more greenish yellow.
Male hypopl'gium with the ninth tergite having a relatively narrow
U-shaped rnedian notch, the broad lateral lobes thus formed conspicuously setiferous. Ventral dististyle ve.fl' large and fleshy, therostral piolongation slender, near its base with two very conspicuous,strongly divaricate spines that arise from tumid basesl spines slightly,rn"qi"i iu size, one brising from a base that is nearly. as large as the
rostral prolongation beyond it, the spine long and straight; the second
is only about two-thirds
spine aiises from a shorter and broader base,_
al long as the other and is strongly bent at base.
Holotype, d , C6rdoba, Barranca of the Rio San Antonio,
altitude 870 meters, November 20, lg21(A. M. Dampf) ; M. B.
102. Allotopoty/e, 9. Paratopotypes, 6 d I .

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Alexand,er: Mexican Craneflies

109

Geranomyia perfecta sp. n.
General coloration gray, the praescutum with three dull black
stripes; scutal lobes black, the median area obscure yellow; pleura
pale ochreous,with longitudinal brown stripes; femora brownish yellow,
the tips blackened, preceded by a vague yellowish subterminal ring;wings whitish, the oval stigma dark brown; paler brown seams on thecord, outer end of cell /sl trf2 and the wing-tip; Sc long; abdomen dark
brovrn.
Fernale. Length (excludingrostrum) about 8.5 mm.; wing, 7.5 mrn.;
rostrum about 3.5 mrn.
Rostrum elongate, as shown by the measurements,black throughout,including the palpi. Antenne black throughout, the flagellar segments
oval to short-cylindrical. Head dark gray, the center of the vertex
rvith a darker line; anterior vertex frig[tei; sides of the gene obscure-vellow.
Pronotutn dark brolvn, the posterior notum obscure yellow laterally.
N'Iesonotalpraescutum with three dull black stripes, the median stripe
vaguely divided behind; hurneral triangles obscure fuh,ous, the interspaces and lateral margins of the sclerite more infuscated; scuturnobscure yellow medially, the lobes black; scutellum obscure yellow,
the baseon either sideof the median line narrowly infuscatecl;postnotum
dark Bray, margined laterally with paler. Pleura chiefly pale ochreous,
longitudinally variegated u'ith brown on the anepisternum and ventral
sternopleurite; pleurotergite gray. Halteres dark brorvn, the base of
the stern narrorvlv pale. Legs rvith the fore coxrc dark bron'n, therniddle and hind coxaeless distinctly darkened; trochanters obscuretestaceous; femora brorvnish yellow, paler basalh', the tips rather
narrorvh' blackened, the amount subequal on all tl-re legs; a \:ague
subterminal vellorvish rirrg; tibirc 1'ellon'ishbron'n, the tips narrowly
dark brown; basitarsi brorvn, the tilrs and remairrderof tarsi brou'nish
black. Wings whitish, the stigma or-al, darlr bron'n; cell Sc darkened;a tiny brorvn cloud at origin of Rs,'cord and outer end of cell lst I[zseanredrvith grayish; n'ing-tip in cells ,Srgto J[s distinctly infumed;
rteinsblack, the obliterative areasextensive. Venation: Sc rnoderately
long, ^Scrending about opposite midlength of Rs, ,Sczclose to the tip ofScr,' Rs approximately three times the basal section of 1ia*5; nt-cct,atthe fork of l/.
Abdomen dark brorvn, inclucling the genital segment. Ovipositor
u'ith the tergal valves short and slender, the sternal valves straight,
darkened.
Ilolotype, Q, near Tepic, Nayarit, altitude 3,069 feet, swept
from shrubs and bushes on shores of a swift-flowing rivulet,N{arch14, Ig27 (A. i\I. Dampf); M. B. 203. Paratopotype,I ;I,I. F. 1191.

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Annals EntomologicalSocietyof America [Vol. XXI,
Epiphragma

Osten Sacken.

Epiphragma oreonJrmphasp. n.
General coloration dark brown, the anterior portion of thepraescutum paler-; antenne (.r) elongate, the first fl-agellar segmenr
yellow; halteres elongate, brorvnish black; femora rvith tLe apical-third
ye1lorv,enclosing a broad black subterminal ring; wings'long andnarr.ow, subhyaline,. rvith an ocelliform brorvn patternl abdominal
tergites dark bron'nish black, the sternites vellorn,-hypopygium darkorown.
g-10 lnn-].; rving, 10.ir-12.5mm.; antennre. fo[ale.- Length about
about 4.3-4.6mm.
Fernale. Length about 11 rnm.; tving about 10 mm.
Rostrum and palpi black. Antennre (O elongate,if bent backrvarcl
extending nearly-to the base of the fourth abdominal segment; scapeblack; first flagellar segmentysllerv; remainder of organ biack; flagellar
segments elongate-cylindrical, the basal enlargenient small. Headbrown, darker rnedially; anterior vertex (.1) .'"r), narrow.
Pronotum chiefly daqk brown; anterior lateril pretergites 1-ellorv.
Ilesonotal- praescutum light golden to ochreous ltrown, th" posterior
half dark brorvn, the usual intermediate stripes more or lesi distinct
throughout their whole length; humeral trianfles and the broad lateral
margins of the sclerite black; scutum light 6rou'n, the lobes and the
median area \zariegated rvith dark brown; scutellum and postnoturn
dark, conspicuousllrpruinose. Pleura brorvnish black, rvith paler areas
on the lneron and ventral portion of the itteropleurite,and intmediatelv
beneath the n'ing-root; dorso-pleuralrcgic,rrduskl-. Haltere-selongate,
brorvnish black, .onlv the ertreure base't,f the itern vellou'ish. Le,gi
rvith the coxe obscure 1'ellorv, the bases narro\\'I1-clarl< ltron'r-r,mostextensiveon the fore coxrcwhere the basal half ii inclucled,narro$,est
on the posterior coxe; in some specimens,the middle and posteriorcoxe are uniformly pale; trochanters obscure yellow; femora brown,p?lef basally, the apical third yellow enclosing a broad, conspicuous
black ring, about equal in extent to the combined yellow ap-exand'subterminal annulus; tibire brown, the base narrowly yellbrv, the,extremetip- very narrowly paie;tarsi paling into golden vellow, especiallythe. posterior tarsi. lVings relatively long and narrow, subhyaline,with a handsome oceliiform brown pattern; cell Sc more yellowishi
brown seamsat h and the supernumerary crossvein in cell C, between
these two latter tu'o broad, pale brown areasthat are margined laterallywith dark brown, the marks continued caudad into cell Sc,' a similar
but smaller area at end of vein Sc,'stigma elongate-o\2a1,
darker brorvn;
ocelliform markings broken, the principal ones having the following
points as centers: Origin of Rs,' anterior cord; m; fork of M42, thesecenters being of a darker brown than the rings; marginal areas at theends of all the longitudinal veins, largest in cells Rz and Rai a large graycloud extends across cells Cz and -lsl ,{ from the ocellus at the originof Rs; the long, narrow cell ?nd:{ is almost uniforrnly grayish brorvn,

1e281

Alexander: Mexican Cranefl.ies

111

intermpted by the ground-color near the base, and, in c'ases,near theouter e_nd;outer end of cell /sf I extensively clouded in similar manner;veins dark brorvn. Venation: Cells beyond the cord long and narrow,the veins with conspicuous macrotrichia; Rz+a+E
longer than Rz+s'i,n-cu about its own length beyond the fork of.tr[, transve]se in position;
cell 2nd,4 long and narrorv.
Abdominal tergites brownish black, the caudal margins of thesegmentsnarrou4t' pale; a lateral yellorv spot at near trvo-thirds thelength of thq intermediate segments; sternites 1'ellorv; hl-popl'gium
dark brorvn.

Ilolotype, &, near San Cristobal, Chiapas, July lT, 1926
(A. M. Dampf); NI. B. 190a. Allotl,pe, 9, Huixtan, Chiapas,
altitude 2,700 meters, in virgin forest, July 7, l 926 (A. M.
Dampf); NI. F. 1022. Paratopotype,c/, with the allotype.
Ep,iphragmaoreonym,phais allied to E. circinata Osten
Sacken (Costa Rica) in the elongate antenne of the male.
It diflers in the details of coloration, especiallyof the thorax
and abdomen, and in the long, narrow wings. The halteresare not brightenedat their tips.
Shannonomyia Alexander.
Shannonomyia
moctezuma
sp.n.
Allied to S. lenta (Osten Sacken),most closely allied to .S.lentoides(Alexander); antenne relatively long, in the male if bent backward
extendilg about to the base of the abdomen; wings rvith a strong
brownish tinge, the broad costal margin darker brorvn, the central
portion pale, producing a longitudinal whitish stripe that extends to thewlng-ttp.

Male. Length about 6 mm.; rving, 7.5 mm.
Rostrum and palpi dark brown. Antenne relatively elongate fora member of this group; scapal segments a trifle paler ihan the darkbrown _flagellum;if bent baclcward, the antenne eitend approximately
to the base of the abdomen; antennal segmentslong-oval, with a dense,
erect, white pubescence. Head gray.
Mesonotum dark brownish gray, the praescutum rvith three scarcely
evident darker brorvnish gray stripei. Pleura bror,vn, uniformly
pruinose. Halteres pale, the knobs scarcely darkened. Legs with th-ecoxe and trochanters brownish yellow; femora yellow, the tlps rveakly
darkened; tibie brownish yellow, the tips narrowly. darkened; tarii
pale brown, the terminal segmentsdark brown. Wings with a strong
brownish tinge, especially the costal third, the posteri,or third a little
paler, the central third nearly clear, to produce a longitudinal pale
stripg that extends from the arculus to the wing-apex, including all ofcell Rt; indistinct brown seams at origin of Rs, along cord and outerend of cell /sl fot2;stigma small, restricted to Re; veins-brown, darker in
the infuscated areas. Venation: Sc relatively short, Scr ending shortly

tt2Societyof America [Vol. XXI,
Annals Entomolog'ical

before the end of Rs, ,Scznear its tip; Rs short, arcuated at origin;
Rz about equal to R1..2and a trifle longer than Rs++iRg and Ra strongly
divergent at ends; cell lst Mz long and narTow, rlt-cu near midlength.
Abdomen dark brown, the ninth tergite and proximal portions of
the basistyles of the male hypopygium a little brightened. Male
hypopygium with the dististyles broadly united basally by pale membrane; apeK of the outer dististyle weakly bifid, narrowly blackened.
Aedeagusrelatively long.
Holotype, 6/, Desierto de los Leones, altitude 3,100 meters, inAb'ies forest, swept from along a swift-flowing aqueduct, March
29, lg25 (A. M. Dampf); M. B. 116. Paratopotype, &.
Shannonomyialentina sp. n.
Allied to S. lenta (Osten Sacken); general coloration light graY,
the praescutum with three inconspicuous,darker gray stripes; sternopleurite conspicuously pale; wings yellorvish, the stigma oval, pale
brown; male hypopygium with the aedeagusshort.
Male. Length about 5 tnm.; wing, 6 mm.
Female. Length about 7.5 mm.: wing, 7.5-8 rlm.
Rostrum and palpi brownish black. Antennre (cf) relatively
elongate,if bent backvvardsextending nearly to the root of the halteres;
scapal segmentsbrorvnish yellow, the flagellum brownish black; flagellar
segmentslong-oval, becoming smaller outwardly. Head dark gray, theanterior vertex and posterior orbits clear light gray.
Pronotum above pale gray. Mesonotum light EfaY,the praescutumwith three darker gray stripes that are relatively inconspicuotls;humeral
region slightly reddish; scutellum slightly reddish behind; postnoturn
gray.
Pleura dark, the sternopleurite largell' buffy . yellow, tlt"
anepisternum darker, to produce a dorsal longitudinal stripe from thecervical sclerites to below the wing-root; dorso-pleural membrane
pale. Hatteres pale yellor,r'. Legs with the coxre obscure yellorv;
irochanters a lit[le darker; femora brownish yellow, a trifle darkened
outwardly; tibie pale brorn'n, the tips weakly infuscated; tarsi Pale,
passinginto black at the ends of the basitarsi. Wings yellowish,_theoval siigma pale brorvn; vague, pale brown seamsat origin of Rs, along
the cord and outer end of cell lst I[2; r'eins pale yellow, those in theinfuscated areas a little darker. Venation: Rz about equal to Rr+z
and a little longer than Rz+aiveins .R3and Ra relatively short, diverging
markedly; cell-/sl tr[2 small, rvidened outrvardly, nr-cut'at or before
midlengih, variable in position; in the type it is only a little shorter
than t[e distal section-of Cua, in other cases scarcely one-half thislength.
Abdomen dark brorvn, the ninth segrnentand basal portion of thebasistyles obscure yellorv. \{ale hypopygium with the outer dististl'leconspicuouslysplit at al)ex. Gonapophysesrelatively small. Aedeagus
short.
Ilolotype, d, near San Cristobal, Chiapas, in narrow'shaded ravine of smal1 rnountain brook, altitude nearly 2,2001e281

Alexander: Mex,ican Cranef,,ies

113

meters,July 15, 1926(A. M. Dampf); M. B. 1g0a. Allotopotyfe, 9. Paratopotype,g; paratypes,d, g, Valle de San
Cristobal,in oak forest,the ground coveredwith leaves,July 28,
1926(A. M. Dampf); M. B. 194.
Limnophila Macquart.
Lininophila madida sp. n.
Male. Length about 8 mm.; wing, 10 mm.
Fernale. Length about 10 mm.; wing, 10-10.5 mrl.
Generally similar to L. guttulatissim,aAlexander (Guatemala-Costa
Rlca), differing especiallyin the coloration of the legs and the structureof the male hypopl,gium.
Rostrum, palpi and antennre dark throughout. Head brownish
Ergy, the -setigerouspunctures appearing as dark brown dots. Legs
with the femora yellow, the tips very broadly blackened, on the foielegs including about the distal fourth, on the posterior legs including
about the distal fifth; tips of the tibire conspicuouslyblac[ened; basitarsi yellorv, the tips and remainder of the tarsi blackened. \,{alehypopygium with the aedeagusrelatively short and strongly sinuous.
Gonapophysesslender,their tips acute.
Ilolotype, c/, San Cristobal, Chiapas, altitude 2,100 meters,

July 6, 1926 (A. iVI. Dampf); NI. B. 184. Allotopotype,9 ,pinned with the type. Paratopotypes,
numerousc/, g , June 4J u l y 6 , L 9 2 6( A . M . D a m p f ) ; N I . B . 1 7 3 ,1 8 3 ,1 8 4 ,1 8 5 ;M . F .
942-952,960,
973.
Atarba Osten Sacken.
Atarba (Atarba) amabilis sp. n.
General coloration light chestnut-brown, the postnotum and pleura
9arker; _antennreblack, the incisures of the segments conspicuously
light yellow; legs yellorv, the terminal tarsal segments darker; rvings
with a graf ish yellorv suffusion, the stigma darker; Sc ending beyond
the origin of the long angulatedRs.
Female. Length about 6.5 rnm.; 'w'ing,7.5 mm.
Rostrum golden-yellow; palpi brownish black. Antennre elongate
for the female sex, if bent backward extending about to the base of theabdomen; scapal segmentsobscureyellow; flagellum black, the base ofeach segment broadly, the tips more narrowly, yellorv, to produce anannulated appearance; flagellar segments elongate-cylindrical. Headbrown, lighter in front and on the occiput.
. Nlesonotalpraescutum and scutum uniformly light chestnut-brown,
the surface shiny, without rnarkings; scutellummore testaceous;postnotum pale, the surface pruinose. Pleura pale brown, the surfacevery
sparsely pruinose, the dorso-pleural region dark. Halteres pale, theLI4

Annals EntomologicalSocietyof America [Vol. XXI,

knobs dark brown. Legs with the coxe and trochanters yellowish
testaceous; femora yellow, the tips of the fore femora very narrowly
and inconspicuouslyinfumed, the other femora undarkened; remainderof legs obscure yellow, the terminal tarsal segmentspassing into darkbrown. Wings with a grayish yellow suffusion, the base and costal
region clearer yellorv; stigma elongate-oval, pale brown; veins dark
yellorv. Venation: Sc1ending shortly beyond the origin of Rs, Scz at
its tip and likervise beyond this origin; lRsrelatively long for a memberof this genus, about as in columbiana,strongly angulated at origin;cell Rg at margin narrower than cell Ra; cell l st I[z relatively large,
irregularly pentagonal; m,-cushortly beyond the fork of M.
Abdominal tergites dark brown, the sternites and genital segments
obscure yellow. Ovipositor r,vith the tergal r'alves slender, gentll
upcurved, the tips acute; sternal valves very deep.
Ilolotype, I , near San Cristobal, Chiapas, in a narro\\:,shadowy ravine, July 17,Ig2t) (A. M. Dampf); NI. B. 190a.
Atarba amabilis is most closely related to A. colum.biana
Alexander (Colombia).
By means of the writer's key to thespecies of-Atarba (Annals Ent. Soc. America, 19:171; 1926), thepresent form runs to megaphallus Alexander, with which it
agrees in coloration of the antenn@, but differs in other respects,
notably the venation.
Elephantomyia

Osten Sacken.

Elephantomyia fumipes sp. 11.
General coloration fulr'ous-)'ellon', in cases rvith a cclnspicuous
median brown stripe on the pronotum and praescutum; rostrum longer
than the body; fernora and tibie dark brown; wings with a strong.brownish tinge, the center of the disk brighter; Rs long, arcuated to
weakly angulated at origin.
MaIe. Length (excludingrostrum) about 7 mm.; wing, 10.5 mm.;rostrum about 8 mm.
Fentale. Length (excludingrostrum) about 9 mm.; wing, 10.5mm.;
rostrum about 9-9.5 mm.
Rostrurn elongate,dark brown, approximately as long as, or slightlllonger than, the remainder of the body. Antenne dark. Head obscureyellow, the center of the vertex darker; anterior vertex very narrolv.
Cervical sclerites dark brown. Pronotum and mesonotum bright
fulvous-yellow, with a conspicuous,median, brown stripe ending justbefore the suture; scutum yellow, the mesal portions of the lobes conspicuously darkened; scutellum and postnotum dark brown, paler
laterally. Pleura shiny fulvous-yellow, the sternopleurite a little
darker. Halteres pale, the knobs darker. Legs with the coxe andtrochanters yellowish testaceous; remainder of legs dark brown, thefemoral bases a little brighter, the tarsi fading into obscure orange.
Wings with a strong brown tinge, especially along the costal region,

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Alexander: Mexican Cranefl,ies

115

beyond the cord, and in the anal cells, cells R and tr't being somewhatbrighter, especiallynear vein Il[; stigma elongate-oval,darker brorvn;
veins brown. Venation: Sc long, Scr and Sczending oppositeor beyond
the fork of Rs, the latter long, arcuated to weakly angulated at origin.
Abdominal tergites brown, the bases of the segmentsindistinctly
variegated with obscureyellow; a subterminal black ring that includes
segment eight and the caudal portion of segment seven; hypopygium
obscure yellow.
In the female, the dorsal median praescutal line is not evident andthe tarsal segments are not so conspicuouslypale.
Holotype, &, Hueitepec, Chiapas, altitude 2,600 meters, indense leafy woods, June 14, 1926 (A. M. Dampf) ; M. B. 170.
Allotype, g , near San Cristobal, altitude 2,250 meters, in dense
forest of oaks and pines, July 7, 1926 (A. NI. Dampf) ; M. B. 186.
Elephantomyia fumipes is very different from the other
It is closer
described l\{exican species, .8. alticola Alexander.
to E. westwoodi Osten Sacken, differing in the coloration of thewings and legs and in the venation.
Teucholabis Osten Sacken.
Teucholabis (Teucholabis)cinereicepssp. n.
General coloration shiny coal black, this including the entire diskof the praescutum;head above silvery gray; pleura with a broad silvery
rvhite longitudinal stripe; knobs of the halteresyellow; wings subhyaline,
the stigma dark brown; abdomenblack, the sternitesbandedwith yellow.
Male. Length,4.8-5 mm.;rving, 5.5-Omm.
Rostrum obscureyellorv; palpi brorvnishblack. Antenne brownish
black, the basal segment of the scape a little brightened beneath;flagellar segmentssubglobular, the outer segmentspassing into oval.
Head blackish, the whole dorsal surface rvith a dense silvery graypubescence;vertex broad.
Pronotum and lateral pretergites yellow. \4esonotal praescutum
shiny coal black, with an obscure -vellowmedian spot just before thesuture, crossingthe latter onto the median region of the scutum; scutum
obscure yellow medially, rvith a silvery pubescencebehind, the lobes
extensively shiny black, confluent acrossthe suture with the praescutalshield; scutellum obscure yellorv, darker laterally; postnotum black,sparsely pruinose anteriorlr'. Propleura -u*ellow. Mesopleura black,rvith a broad pale longitudinal stripe extending from behind the forecoxe, passingbeneath the halteres to the hind cox&, this stripe densely
covered with microscopic silvery white pubescence; meron pale.
Halteres dark, the knobs obscure yellow. Legs with the coxe andtrochanters obscure brownish yellow; fore femora yellow basally,
passinginto black at tip;middle and hind femoranot darkenedapically;
posterior tibie brownish yellow, the fore tibiae more blackened, themiddle tibie dark bror,vn; tarsi black. Wings subhyaline, the sub-

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Annals Entomologicalsoc,ietyof Americo [vol. xxl,

circu-larg-tig-ma..d3rk
brown; a vague !r9wn seam on the anterior cord;basal half of cell ,Scinfumed; veins dark brorvn. Venation: Sc relatively
Sott, Scr ending.about ppposite one-fourth to one-fifth the lengttr dt
Rs, _sc2variable in positiol, in t_he_typeremoved from the tip 6f ,srr,iL thq paratype closer to the end; Ri iong, strongly arcuatedi Rz at ors]ightlV before the fork of Rs,.R3aaand_Rabeyond ii relatively stiaight,.R5bent strongly.to the yin-s-tjp s-ocell R4 is very wide at the,""{i"j,n-cu closeto or before the fork of. tr[.
Abdominal tergites b_lack, the .segments restrictedly yariegatedlaterally with_obscure.yellory;sternites black, the caudal margiis of
the segme-ntsbroadly banded with obscure yello'w,
the outer stirnites
more uniforrnly. -pale; hypopygium
black. Male hypopygium r,vith^"ti,iboth dististylei blacken"aiach terminating in "'"*ii"T".arpn".
Holotype, d , Pefla Blanca, December lb, Ig24 (A. M.

Dampf); M. B. 109. Paratopotype,&.
T-eucholabis
cinereicey'sis readily distinguished from similarlycolored speciesby the silvery gray head and plain wings. The
locality was discussedin some detail in a preceding p"tt under
this title (Annals Ent. Soc. America, 1g:171; Ig26).
Gonomyia N{eigen.

Gonomyia(Gonomyia)debilis sp. n.
group;sizesmall (rving, g, under-1mm.);. Belongsto th.e-cognatella
pleura yellorv_witha singlenarrow bron'n stripe;'abciominaltergites
dark brown,the caudo-lateralarrglesobscure1-eiloiv.

Female. Length about ii.jl-3.; nlnr.; n-ing,jj.(j-j1.8mm.
Rostrum and palpi black. Antennaervith tlie first scapal segment
orange; second segment yellorv; flagellum dark bron'n. Head orangeyellow, the center of the vertex more or less darkened.
Pronotum yellow. N4esonotal praescutum grayish-large brown, thelateral marginj vellow, the pseudosutural fovee
but pale and.
rnconspicuous;scutal lobes brorvn,_the rnedian area obscure yellow;
scutellum testaceous;postnotum pale brown, paler laterally, the-caudai
margin_narrorvly darkened. Pleura pale, with a single narrow darkbrown longitudinal stripe extending from the cervicaf sclerites to thepostn_otuPr_Passing_above_theroot of the halteres;sternopleuritevery
weakly_darkened; dolso-pleural region clearer yellow. Iialteres relatively 19tg, brorvn. legl _with the coxe and irochanters testaceous;remainder of legs brownish t_estaceous,
the terminal tarsal segments
passing.into darker brown. Wings rvith a brownish gray tin[e, thesmall stigma a little darker brown; veins still darker broi,'n. Veiation:
Sc short, .Scr ending far before the origin of Rs, Sc2a short distancefro.- its tip, the distance on radius between Sczand origin of Rs aboutlwicg nt-cu; Rs nearly if. not quite in_alignment with Ri; Rr+r+anearl|in alignment with r-m, .the v-ein9at the end of Rs thus tcirmiirg a cruciform arrangement; petiole of cell .Rsstrongly arcuated, about 6ne-third

1e281

Alexander: Mexican Cranefl,ies

t17

longer than Rgi Ra about three times as long as R3; cell M2 open by theshortly before the fork of, M.
atrophy of the deflection of. Mg; ?71-cu
Abdominal tergites dark brown, the caudo-lateral angles of the segments obscure yellow; sternites obscure testaceous yellow.
Ilolotype, g , San Isabel, Chiapas, altitude about 650 meters,
July 30, 1926 (A. M. Dampf); M. F. 1,057. Paratopotype, 9.
Gonomyia (Lipophleps) peracuta sp. n.
tr[ale. Length about 3.5 mm.; wing, 3.I-3.2 mm.
Belongs to the pleuralis group; \zery distinct in the structure of themale hypopygium.
Rostrum and palpi brorvnish black. Antenne with the scapal
segments orange; flagellum brownish black, with very long verticils
in the male. lVlesonotum bright cinnalnon bror,vn; scutellum yellow
with a narrow brownish black median line; postnotal mediotergite
reddish brown with a darker spot at base. Pleura with the two brdrvn
stripes rzery distinct, a little narrower than the white stripe enclosed;
dorso-pleural region lnore or less darkened, especially in front. Halterespale, the tips of the knobs yellowish. Legs rvith the femora brown, thetips narrorvly but conspicuously whitened, preceded by a broader darkbrown subterminal ring. Wings faintly tinged with brown, the baseand costal region clearer yellorv; conspicuouscream-coloredareas before
and beyond the stigma and along the cord; stigma oval, dark brown;veins pale, the cord and outer end of cell lst I,[z dark brorvn. \renation:
Scr ending a short distance before the origin of Rs,' m-cxca short distance
before the fork of, M. Abdominal tergites obscure yellorv, marginedlaterally and caudally with brownish black, the median line of thesegments a little dusky; sternites more uniformly yellor,vish. Male
hypopygium with the basistyles terminating in a flesh1' lobe and asingle, conspicuous,broad-basedspine. Dististl'le single, broadly oval,
terrninating in trvo conspicuoussetzc,and bearing a very large, elongate,conical spine, as r,vell as a smalier, paie, slender spine, these latter
unequal in size on the dististyles of the two sides of the unique type.
Long arms of the gonapophyseslikervise asymmetrical, one being much
shorter and nearly straight, the other sinuous, the acute apex morenarrou'ly blackened.

Ilolotype, d, Santa Lucia, Chiapas, altitude 575 meters,
July 29, 1926(A. M. Dampf); M. F. 1,055.
Erioptera Meigen.
quadrifurcatasp. n.
Erioptera (N{esocyphona)Male. Length about 2.1-2.3 mm.; rving, 2.2-2.5 mm.
Most closely related to E. (M.) troglodytaEdwards (Trinidad),.differing especially in the dark coloration, the different leg-pattern.and the structure of the male hypopygium.

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Annals Entom.ologicalSocietyof America [Vol. XXI,

Rostrum and palpi brorvnish black. Antennal flagellum pale brorvn
or yellorvish brorvn. Head dark brown, the anterior region of thevertex brighter. Mesonotum dark brown, rvithout evident stripes;
scutellum a little paler. Pleura dark brown, with a broad silvery
yellow stripe extending frorn behind the fore coxe to the base of th-e
1!d9men, th9 dorso-pleural region usually dark. Halteres with yellowish knobs. Legl rvith the coxe dark; trochanters obscure testaceous;femora yeilow rvith trvo dark annuli, most conspicuouson the posterior
femora, the subterminal ring a little darker in color than thb medial
ring; on the fore legs the coloration is more infumed, with only thesubterminal ring; tibia and tarsi yellow. Wings short and broad,with a faint brownish tinge, immaculate; veins and macrotrichie
darker. Abdomen, including the hypopygium, dark brown. Male
hypopygium with the dististyle single, with four free points, the outer
being a slender, dark-colored rod, the inner a long pale rod, the main
body of the style being produced into a stout curved arm that is split
at apex into two parts, the outer a broad, flattened, curved blick
portion, the margin microscopically sermlate, the second point slender,much _lgtg.l, pale in color. Gonapophysesappearing as long, gently
curved black horns, the tips acute.

Habitat: IVlexico,Salvador. Ilolotype, d, Rancho Sabino
Perez, Chiapas, Mexico, altitude nearly 500 meters, hilly
country with bush and forest, with small rivulets, at light,
Joly 28, 1926 (A. M. Dampf); M. F. 1,052. Allotype, 9 , San
Isabel, Chiapas, altitude about 650 meters, typical pine ridge
vegetation, neal swift-flou'ing brook, at light, July :J0, 1926
(A. M. Dampf); M. F. 1,057. Parotypes, & I , with theallotype; 1 6/, Agronomia,Sonsonate,Salvador,altitude 1,500
feet, March 20, 1926 (K. A. Salman).
Cryptolabis Osten Sacken.
Cryptolabis(Cryptolabis)fuscovenosa
sp.n.
Head obscure yellow, the central third dark brorvn; mesonotal
praescutum rvith three velvety-black stripes; pleura black, striped
longitudinally with yellowish rvhite; femora yellowish brown, the tips
blackened; rvings rvhitish with conspicuousgrayish brown seams oncertain of the veins; macrotrichie of the cells sparse, including cells
Rs to I[2.
Female. Length about 3.6 mm.; wing, 4.2 mm.
Rostrum and palpi black. Antenne black throughout, short, theflagellar segments oval. Head obscure yellow, the central third of
the vertex and occiput dark brown.
Pronotum rvhitish yellow. Mesonotal praescutum virtuallrl' coveredby three velvety-black stripes, the interspaces very narrow, paler
brown; humeral region orange-yellow; lateral margins of praescutum
narrowly yellorvish, margined internally by the black lateral stripes;

1e281

Hungerford: Two New Notonecta

119

scutum pale brown medially, the lobes black; scutellum obscure yellow,
darker basally and laterally; postnotum black, the extreme cephaliclateral angles yellowish white. Pleura black, striped longitudinallywith pale yellowish white, the. dorsal stripe including the dorso-pleuralregion, passing beneath the wing-root, across the dorsal portion of thepleurotergite to the mediotergite; ventral stripe narrow, traversing thesternopleurite; a small spot before the root of the halteres. Halterespale. Legs with the cox& and trochanters obscure yellow; femora
yellowish brown, the tips rather narrowly but conspicuously blackened;tibie obscure yellow, the tips narrowly blackened; basitarsi yellowish
brown, the distal half and the remainder of the tarsi brownish black.
Wings whitish, with conspicuous grayish brown seams along severalof the veins, including the anterior cord; R2and adjoining veins; broader
washes along veins Rsr Ma, fl[ar Cu and rn-cu; axilla conspicuously
darkened; veins dark brown, costa paler. Macrotrichiae of cells very
sparse, there being none in cell Rs, a few in outer end of cell Ra;
rows of trichire in the distal half of each of cells Rs and Mz. Venation:
Sc short, Scr ending before the fork of Rs, Scz far before the origin ofRs; Rs strongly convex; Rz a little longer than Rz+g,the two nearly intransverse alignment; cells beyond the cord deep.
Abdomen dark brown, the genital segment paler.

IfobQpe, g , Rio Mayo, near Navojoa, Sonora, March 25,
L927(A. M. Dampf); M. F. 1,221.