260
LIX.

TIIE

CANADIAN

ENTOMOI.OCIST

r8+

Excerpts from Canadian Ent,omclogist August, lgtl

NE'vVNEARCTIC CRA\IE-FLIES (TIPULIDAE, DIPTERA). PART XII.
BY CHARLES P. ALEXATqPE&

Amherst,Mass.
The precedingpart under this generaltitle was publishedin rgzr (Can.
Ent-, 53 r3z-ry7). The speciesdiscussedat this time are all included in thevery extensiveseriesof these flies belongingto the CanadianNational Collection
and kindly sent to me for determinationby Mr. Curran. f am greatly indebted
to Mr. Curran, and to the various collectorsof the material, for the opportunityof studying this important seriesof specimens.

Tipula apcurata n. sp.
Generalcolorationgral, the praescutumwith four brown stripes; antennal
flagellum dark brown; femora vellow, the tips broadly dark brown; wings strongly tinged with brown, conspicuouslyvariegatedwith white before and beyondthe
stigrna; male hypopygium large and conspicuous.
Male.-LenSh, about r2.5-r5 mm.; wing, r2.2 rs-mm.
Female.-Length, about rr mm.; wing, rr mm.
Frontal prolongationof the head shiny brown, more yellowish laterally;nasus short and stout; palpi black. Antennae with the scapal segmentsyellow,
the first segmentelongate;flagellum dark brown. Head brownish gml, clearer
gray on the frontal portion and orbits, with a broken capillary darker vitta.
Pronotum brownish gray, conspicuouslysetiferous,the scutellum narrowly china-white. Mesonotalpraescutumgray or brownish gray, with four darker
l'ri'rnn siripes, the long intermediatepair not quite attaining the suture; Iateral

IE5

TIIE

CI,NADIAN

ENTOMOI.OGIST

AUG., 1927,

stripes shorter; besidestheseusual four stripes,a shorter brown line on either sidein front, not connectedwith the lateral stripes; scutum gray, eachlobe with two
brown areas; scutellum pale brown; postnotum more grayish. Pleura dark,
pruinose. Halteres yellow, the knobs dark brown. Legs with the coxae pale,pruinose; trochantersyellow; femora yellow, the tips broadly dark brown; tibiae
brownishyellow, the tips more narrowly darkened;basitarsibrownishyellow, thetips and remainderof the tarsi dark brown. Wings with a strong brownishtinge,
conspicuouslyvariegated-with whitish in the vicinity of the cord and beyondthe
stigma; stigma oval, darker brown; basad of the cord the white areas continue
along the main veins, restrictingthe ground-colorto elongatestreaksin the centers of the cells; the white area beyond the stigma occupiescell znd R, and thebroad basesof cellsR, and R, ; obliterativeareasalongthe cord conspicuous;veinsdark brown, paler in the whitenedareas. Venation: Rs relativelylong; tip of R,
entirelypreserved;cellM, a little lessthan twice its petiole; distal sectionof.Cu,
strongly bent at tip.
Abdomenobscureyellow, the tergiteswith three interruptedbrown stripes;
sublateralstripes conspicuous,becomingobsoletebeyond the fifth segment;lateral margins broadly, caudal margins narrowly pale; sternites yellolv, with aobbroad, more nearly entire black stripe; hypopygiumvery large, comPressed,
scure brownish vellow. Male hypopygiumwith the ninth tergite a large flattenedplate,with a very deeplinear mediannotch,the laterallobesthus formed obliquely
truncated. Outer dististyle small, elongate,cylindrical. Inner dististyle small.
Ninth sternite and basistylerelatively small, the latter complete,largely paie,
the sternite with a large fleshy pale lobe immediatelyventrad and caudad of thebasistyle,these lobes hanging pendant, their lower ends provided with densebrushesof rather short reddish setae. Eighth sternite very extensive,jutting
caudad,each caudo-lateralangle produced into a short lobe that bears a densebrush of long pale setaeand a strongly sinuousspineor fascicleof bristles. Female with the valves of the ovipositor elongate,chitinized,the margins smooth.
Habitat.-British Columbia, Alberta.
H o l o t y p e , 6 , K e r e m e o sB, . C . , A u g u s t r , r g 2 3 ( C . B . D . G a r r e t t ) .
Allotopotype, g, August 2, 1923.
Parotopotypes,7 6's, Jane z6_july 15, rg23; paratypes,26's, Banff,
Alta., August Z-r8, rg22 (C. B. D. Garrett) ; r 6, Waterton Lakes, Alta., JulyrS, rg23 (J. McDunnough).
Most closelyallied to T. barbataDoane,dif fering in the genitalic characters.

fipula subbarbata n. sp.
General coloration gray, the praescutum with four narrow brown stripes;
antennal flagellurn black; femoral tips narrorvly dark brown; wings with a graysuf fusion, conspicuouslyvariegated with white before the cord; abdomen yellow,
the tergites trivittate with black; male hypopygium with the ninth ter$ite large,
the caudal margin broadly emarginate, with a smaller median incision.
Male.-Length, ro.5-r2 mm.; wing, 9.8-12.8 mm.
Female._tr-ength,r2.5-r4 mm.; wing, ro.5-r2.5 mmFrontal prolongation of the head above shiny brown, rnore yellowish later-

TflS

CANADIAN

ENTOMOI.OGIST

r86

ally and below; nasuslong and distinct. Antennae with the scapal segmenrsyellow, the flagellum black. Head grayish brown, the posterior orbits broadly lightgrai', the cephalicportion similarly colored; occipitalregion brownish gray, transverselyringed with darker; a broken capillary darker brown median vitta.
Pronotum brown, darker medially, the scutellar lobes bright yellow. Mesonotai praescuturnbrownish gray, with four darker brown stripes, the inrermediate pair darker; lateral stripes paler; a triangular brown area occupyrngthe
humeral region of the prescutum cephaladof the lateral stripes; scutum gray,eachlobe with two brown marks; scutellumand postnotumgray, the former witha capillary dark brown median vitta. Pleura gray, the dorso-jleural region lightsulphur-yellow;a silnilar sulphur-yellowmark at baseof halter. Halteres obscureyellow, the knobs dark brown. Legs with the coxae pale, sparsely pruinose;
trochanters brownish yellow; fembra yellow, the tips narrowly dark brown;
tibiae obscure yellow, the tips broadly infuscated; basitarsi brownish yellow,
darkenedoutwardly, the terminal tarsal segmentsuniformly dark brown. Wings
with a grayish suf fusion, the stigma darker; a conspi.troo,white area before tilecord, extending from cell rsf R, into the base of cell Mr; a less distinct whitearea beyond the stigma; a brown cloud at the caudal margin of the wing; veinsdark brown, the obliterativeareas very extensive. Venation: Distal section ofR, entirely preserved,the basal section long; cell rct M, relatively long; m aa little shorter than the petioleof cell rst Mr.
Abdominal tergites yellow, with three interrupted black stripes; caudal
margins conspicuouslylight yellow, more evidently so on the outer segments;
lateral margins of the tergitesbroadly but inconspicuouslypaler; sternitesyellow
with a broad median black stripe; hypopygium generallypale. Male hypopgiumwith the ninth tergite extensive,the caudal margin broaily emarginate,witha'very narrow median split. Outer dististyle long and slender,
with conspicuous
setae. Inner dististylea flattenedpale blad.e,the caudal margin of whichbearsasinglegently curved spine. Eighth sternite with a densebrush of setaeon eitherside of the median line. Ovipositor with the valves unusually large anddeep,
their margins smooth.
H abitat.-Saskatchewan,Alberta.
Holotype, 6, saskatoon, Saskatchewan,August rT, tgz6 (Kenneth x,I.
Ki n g ) .
Allotopotype,9, August 27, rg2s (K. M. King).
Paratopotypes, g , Jaly 26, rg21; 6, August z, rg23 (K. M.
King) ;
paratypes, 206 g, Alberta, without exact data (E. H.
Strickland), in the col_lection of the University of Alberta.
The closestrelative is 7. barbata Doane, which is readily separatedby
the snrcture of the rnale hypopygium,especiallyof the inner disiistyre.

fipula imbeUis n. sp.
GeneralcolorationSriy, the praescutumrvith four narrow brown stripes;
antennal flagellurnbeyondthe first segmentblack; femoral tips darkened; wings
SraY, without a conspicuouspattern except a whitened area before the cord;male hypopygium with the basistyleproduced caudad into a slender point.
Male.-Length about 9.S mm.; wing, 9.6 mm.

r87

TIIIi

CANADIAN

ENTOMOLOGIST

ArrG.,1927.

Frontal prolongation of the head shiny brown above, brownish yellow
laterally, the nasus distinct; palpi dark brown. Antennae with the scapal segments yellow; first flageliar segment brownish yellow; remainder of flagellum
black, the segments without conspicuous basal enlargements; antennae of moderate length, if bent backw,ard, extending about to the base of the abdomen. Headdark gray, lighter in f ront and along the posterior orbits; a capillary brownish
black median vitta.
Pronotum brown, the narrow scutellar lobes china-white. Mesonotal praescutum gray with four narrow but conspicuous brown stripes, the intermediatepair narrowly separated for their entire length by a darker gray vitta; lateral
stripes reaching the suture; humeral region narrowly margined externally by apale line, this, in turn, bordered by a darker area lying just cephalad of the lateral stripes; lateral margins of the sclerite of this same color; scutum gray, eachlobe with two dark brown areas; scutellum gra] i postnotum gray. Pleura gral,
Halteres yellow, the knoDs dark
the dorso-pleural region extensively buffy.
brown. Legs with the coxae gray; trochanters yellow; f emora yellow, the tips
rather narrowly but conspicuously dark brown; tibiae yellow, the tips narrowly
darkened; basitarsi light brown, the tips and remainder of tarsi dark brown.
Wings with a grayish tinge, the pattern much as in T. accurafo, there being aconspicuous pale area before the cord, extending from cell rsf R, across cell
Ist M2 into cell Mr; no very evident pale area beyond the stigma; in the analcells, the dark color is more evident and streaked in appearance,this coloration
confined to the distal two-thirds of the cell; veins dark brown, the obliterative
areas along the cord very extensive. Venation: Distal section of R, entirely preserved ; cell rsf Al[, relatively long and narrow ; petiole of cell M, about equal to m.
Abdominal tergites obscure vellow, with a relatively inconspicuousdorsornedian stripe, best indicated on the basal segrnents;caudal margins of segments
yellow, more conspicuous on the posterior segments; lateral margins broadly but
less conspicuouslvpale, margined internally with a dusky line; sternites brownish
yellow, the caudal margins of the segmentspale; hypopygium concolorous withthe remainder of the abdomen. Male hypopygium with the basistyle produced
caudad into a long point, the tip of rvhich is weakly blackened; posterior lobe of
inner dististyle produced into a conspicuous structure that terminates in threelong blackened horns, the outer larger; eighth sternite rvith a median brush oflong yellow setae.
H abitat.--British Columbia.
Holotype, 6, Osoyoos,May 18, rgz3 (C. B. D. Garrett).

Tipula bucera n. sp.
Generalcolorationlight yellowishbrown, the praescutumwith four darkbrown stripes.the spacebetweenthe inten-,ediatestripes grayish brown; wings
with a very pale brown tinge, with a conspicuouswhitened area before thecord ; cell M, shorter than its petiole; male hypopygium with the basistyleproducedcaudadinto a slenderPoint.
Male.-Length, about 12 mm.; wing, r3.5 mm.
Frontal prolongation of the head shiny testaceous,a little darker above;nasusdistinct; palpi dark brown. Antennaerelatively short, if bent backward not

LIX.

triE c^NoDrAN ENTorvr.olocrsT

r88.attaining the wing-root; scapal segmentsyellow; flagellum brown, the first segm6nt paler brown; basal enlargementsof the flagellar segmentssmall. Headlight grayish. brown, paler in front, the region of the anterior vertex with asmall brown spot,in casescontinuedcaudadto producea capillary line.
Mesonotalpraescutumlight yellowishbrown with four dark brown srripes,
the space betweenthe intermediatestripes more grayish brown; scutum lightbrown, the lobes with darker brorvn marks; scutellumsmall, brown; postnotum
more grayish brorvn. Pleura testaceous,scarcelypruinose. Halteres relatively
long, pale, the knobs a little darker, the baseof the stem yellowish. Legs withthe coxaepale; trochantersyellow; femora obscureyellow, the tips narrowly andindistinctly infuscated;tibiae brownishyellorv,the tips very narrowly infuscated;tarsi darker brown. Wings with a very pale brownish tinge, with conspicuous
whitenedareas.before the cord ; stigma relatively small, oval, pale brown; veins
pale brown, the obliterative areas extensive. Venation: Distal section of R,
entirely preserved,with but felv macrotrichiae; cell M, shorter than its petiole;cell M, sessiieor short-petiolate;vn-cuon Mn on short distancebeyondtheorigin.
Abdominal tergited shiny brownish yellow, with a very slightly darker
dorso-medianline; caudal nrarginsof the segmentsnarrowly pale; a broken sublateral dark line, in casesrestrictedto isolatedbrown markings on the individual
segments,narrowly lined rvith darker brownish black; sternitesobscureyellow;
hypopygium pale. Male hypo'pygiummuch as in T. imbelli.s,sp. n., the tergite
being very short, the caudalmargin narrowly chitinized. Basistyleconspicuously
producedinto a long acute spinouspoint. Posterior lobe of the inner dististyle
greatly flattenedand appearingas a pale blade,the caudal angle being produced
into a long curved horn, a litrtlelonger and more curved than the spine of thebasistyle.
Habitat.-Alberta.
H o l o typ e , g , B a n ff, August 3c,,r g2r ( C. B. D. Gar r ett) .
Paratopottpe, C .

Prionocera eleota n. .sp.
General coloration gray; praescutum yellowish gr"y with four dark brown
stripes; pleura blue-grav; wings grayish white, the apical cells strongly infumed;
a conspicuous rvhite band before the cord.
Male.-Length, about rr.5 mm.;wing, 13 mm.
Frontal prolongation of the head relatively short, shiny dark brown above,
the base blackened, the sides yellorvish ; nasus relatively shortand stout; palpi
dark brown, the extreme apex of the last segmentpaler. Antennae withthe first
segmentyellorvish brorvn. the second segment obscure orange; flagellum brownish
black, the first segnrent paler at base; apex of each of flagella.r segments one
to nine ventrally produced to give a serrate appearance to the organ, the terminal s€glnent abruptly smaller. Head in front and beneath silvery-white, moreyellowish surrounding the antennal bases; vertical tubercle compressed, with aconspicucus black spot on either side, immediately behind the antenna; remainder of head yellowish gra.r',conspicuoudly dark brown medially.
Pronotal scutum gray, the scutellum and the anterior lateral pretergites
bright yellorv, narrowlv rl:rrgined internally with blackish. M.esonotal praescu-

r89

TIIE CANADIAN ENTOMOLOGIST

AUG., 1927.

tum yellowish gray with four dark brown stripes; humeral region restrictedly
fulvous, the pseudosutural fovea deep, black; scutum yellowish gralr each lobe
with two dark brown areas; scutellum dark gray, the parascutellabrown; Postnotum dark, ligh,t gray pruinose. Pleura bright blue-gray, the dorso-pleural membrane buf fy-brorvn; an oblique raised welt on the pleurotergite obscure yellow.
Halteres brownish yellow, the knobs black, their apicesa little paler. Legs withthe coxae bluish gray; trochanters obscure yellow; femora obscure yellow, thetips narrowly blackened;tibiae brownish black, the outer portions a little darker;
tarsi black. Wings grayish white, the cells beyond the cord more strongly infumed, to produce a dimidiate appeafance; wing-base and cells C and Sc moreyellowish; stigma brown, the proximal end abruptly light yellow; narrow pale
brolvn seamson most of the longitudinal veins; a broad white obliterative stripe
extends acrosscells rsf R' the outer end of R and the baseof rsf M", barely entering Mr, the veins traversed by this area similarly pale. Venation: Vein R,
at margin is subequal to or even a little narrower than cell Rr.
Abdomen grayish brown, the basal segment clearer gra! i a broad darker
brown median stripe, interrupted by narrow grayish yellow posterior margins on
tergites trvo to seven: lateral margins of segmentsbroadly grayish; segments
eight and nine blackened;terminal sternites dark gray, the caudal margins of thesegments pale; sternite of the hypopygiurn and the outer dististyle chestnutbrotvn. Male hy,popyglumhaving the tergite with a conspicuous,narrow, laterallobe on either side,these lobes directed caudad.Basistyle very small but complete.
Outer dististyle large, broader at base, narrowed to the blunt tips.
Habitat.-Labrador.
Holotttpe, 6, Hopedale,July r, rg23 (W. W. Perrett).

Phalacroceravancouverensisn. sp.
Wings with the distal section of R2 preserved, very short, diverging
strongly from R,.^, cell R" at the margin being nearly one-half longer than cell R".
Fem,ale.-Length, about 13 mm.; wing, rz.6 mm.
Rostrum dark brown, pruinose; palpi black. Antennae black throughout;basal five or six flagellar segmentsoval, the others becominglnore elongate-oval;
terminal segment elongate,nearly twice the penultimate; verticils relatively longand conspicuous. Head dark brorvnish black, sparsely pruinose above, lnore
heavily so beneath.
Mesonotum of the unique type black, any pruinosity normally pres€nt
destroyed by discoloration,only the postnotum preservednaturally, heavily pruinose; scutellumdark, the parascutellapale brown. Pleura dark, heavily gray pruinose. Halteres obscure yellow, the knobs dark brown. Legs with the coxae
dark, heavily pruinose, the apex of the posterior coxa pale; trochanters obscureyellow; femora brownish yellow, clearer yellow basally, the tips rather broadly
dark brown; tibiae and basitarsi light brown, the tips narrowly darkened; remainder of tarsi dark brown. \\t:ngs with a strong brownish suffusion, thestigma only a trifle darker; rreinsdarker brown. Venation: Distal section of Rt
preserved, opposite r-rn; r very elongate, the proximal two-thirds provided withnumerous macrotrichiae (abou't a dozen), the distal third glabrousi Rr*, subperpendicular at origin; basal section of R, short, the distal section entirely preserved,

TTIE CANADIANENTOMOLOGIST

r9p

short, divergent from Rr*r, cell znd R, at margin being longer than cell R, but
shorter than R, ; cell R, nearly one-half longer than cell R"; r-m distinct; petioleof cell Mraboat equal to the element closing cell rstr M* this latter cell narrowed
outwardly.
Abdominal tergites light yellowish brown with a conspicuousblack medianstripe, the first segmentuniformly darkened,pruinose; sternitesbrownish yellow
with a similar blackish median vitta; caudal margins of the se.gmentsnarrowly
pale, more broadly on the outer segments. Ovipositor with the valves relatively
long, flattened,obscurefulvous; tergal valves with the tips subacute,the caudal
margins microscopicallyserrulate.
H abitat.--British Columbia.
Holotype, g, Vancouver,April ro, rg22 (W. B. Anderson).
In Phalacrocerareplicata (Linn.) and P. neoreno Alex., the other species
having the distal section of vein R, pr'eserved,this element is longer and does notdivergestrongly from R,*s, c€ll R, at the margin being narrower than celi R"; r-m
obliteratedby the fusion of Rn*uon Mr*r.

Limnophila (Phylidorea) fuscovenosa n. sp.

l\General coloration dark brorvn; antennal flagellum chiefly obscure yellow; legs brown; wings whitish subhyaline,all veins broadly and mnspicuously
seamedrvith brown; Sc short, Sc, ending before the fork of Rs.
ps77x6ls.-l,ength,
about 9.5-ro mm.; wing, ro-ro.8 mm.
Rostrum gray, the palpi dark brown. Antennae with the first scapal
segmentdark brown, sparselydusted; succeedingsegmentsobscureyellow, only
the outer flagellar segmentspassing int'o brown. Head dark brownish gray,brighter in front.
Pronotum dark brown. Mesonotum dark brown, the median area of thepraescutumsubglabrousto produce a broad median stripe, the remainder of thenotum with a sparseyellor,vishgray pollen; scutellumbehind a little more reddish
brown. Pleura dark grayish brolvn, the dorso-pleuralmembranea little paler.
Halteres yellow, the knobs dark brown. Legs with the coxae brown; rrochantersobscureyellow; femora light brorvn, the basesnarrowly obscureyellolv; tibiae
light brown, the tips narrowly infuscated; tarsi brown. Wings whitish subhyaIine, the veins broadl,'-and conspicuouslyborderedwith brown; costal cell dark,
only the proximal end a little paler; the brown seamsinclude all the veins except
the basalthird ol M, wider on the veins of the distal half of the wing and along
the cord; stigmadarker brown; wing-apex broadly infumed; veins darker brown.
venation : sc unusuallyshort, sc, ending oppositethe fork of Rs; sc, about threetimes Sc' ending oppositethe fork of Rs; Rs relatively long for a member ofthis subgenus,a little shorter in the paratyp€i Rr*e*eshorter than the basalsectionof R, i Rr*, sinuous,f orming the lower border of the stigma; R, and Rr*" subequal; distal end of R, atrophied in the type; cell rsf M, relativelylarge; cellMr
about one-half longer than its petiole:'rn-cu more than its own length beyond
tlie fork of M.
Abdominal tergites dark brown, paler lateraliy; sternites yellowish brown.
Ovipositor with the genital segmentdark, the elongatevalves horn-colored.
H abitat.-Alberta, British Columbia.

I9I

THE CANADIAN ENTOMOLOGIST

AUG.,1927.

Holotype, g, Banff, Alberta, July 19, ryzz (C. B. D. Garrett).
Paratype, 9, Revelstoke,B. C., altitude 5000-6000feet, July zo-zt, t9z6
(J. McDunnough).

Gono.myia(Ftilostena) icasta n. sp.
,Belongs to the blanda group; most closely allied to G. (.P ) colorad,ica
Alex., differing in the coloration of the body and wings and the ihort petiole ofcelTM r; praescutum brownish gray, the humeral regions bright yellow pleuraidark with a conspicuousyellorv longitudinal stripe; stigma brown.
Female.-Length, about 4,6 mm.; wing, 6 mm.
Rostrum and palpi brownish black. Antennae dark brown throughout;flagellar segments long-oval, becoming even more elongate outwardly. Headdark, pruinose.
Mesonotum badly injured in p.inning, the praescutum chiefly brownish
gtlY, the humeral region and anterior lateral pre.tergiteslight sulphur-yellow;
pseudosutural foveae black i scutellum chiefly obscure yellow; postnotum gray_ish brown, the cephalic lateral angles of the mediotergite yellow. Pleura brown,
more reddish brorvn ventrally, darker brown dorsally, with a broad conspicuous
sulphur-yellow stripe extending f rom behind the fore coxae, passing.beneaththebase of the halteres, to the abdomen i dorso-pleural region y.ilo*.
Halteres yel_low, the knobs infuscated. Legs with the coxae and trochanters pale
brown;
femora pale brown, the tips a little enlarged; tibiae brown, broken
beyond theirbases. Wings tinged with grayish, the short stigma brown, relatively
conspicuous;veins still darker brorvn. Venation: ,Sc, ending about opposite
two-thirds the
Iength of the long arcuated Rs; basal section of R, represented
by a weak spur
otr Rr*r*n, the latter about one-third Rr*ni R, short, nearly transverse,
fused backfrorn the wing-margin for a short distance with Rr*r; Rnelongate but shorter
than Rs, the tip turned slightly cephalad; second section of M about
one_fourth
longer than the second section of. M, (petiole ol cell Mr).
Abdominal tergites light bro$,n, the sternites a trifle paler,
the outersegments with the extreme caudal margins yellow. Ovipositor-withthe valves
horn-colored.
Habitat.-Alberta.
Holotype, 9, Banff, June5, ryzz (C. B. D. Garrett).

Rhabdomastix (Sacandaga) subcauda,tan. sp.
General coloration dark brownish gray; legs brownish black; wings
tingedwith pale gray, the stigma darker; sc, atrophieJ; basal
section of R, {aint but
distinct.
Femnle.-Length, about 5 mrn.; wing 6.2 mm.
Rostrum, palpi and antennae black. Head dark brownish
gray.
Mesonotum dark brownish gra}, the praescutum withtwo cl,osely approximated intermediate brorvn stripes that are ,rot "onspicuous
against the dark background; scutellum paler reddish brcrvn behincl. Pleura
dark brownish gray.
Halteres dirty white, the knobs a trifle darker. Legs with thecoxae snrall. dark
. re:1ainclercf
brown; trochantersobscurev:!l^.,.-j":-!.---r'..r.,ilegs broq,n:slrltl:,c!i,.
t'.e. fenr^ra.lbases sc:.rcel.r,
prie:\\iinrs ..vit]ra. pale grayish tinge. i_:.1:sc:.:t.
tlre base trrrrclvly whit'sh: st:gr::apale h:rn'r: veins rlarker brown nrac:.ltri-

LIX.

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CANADIAN

ENTOMOLOGIST

I92

chiae sparse,on R* and Ro except at extreme base; none on R2+a+4,
Rr*., R, or
Rr; a coupleat end of Rs; no other trichiae basadof cord except on C and R.
Venation : Sc, atrophiedi Sc, ending immediately before the f ork of Rs i Rr*r*+
and Rr*, subequal;basal section of R, faint, about one-half as long as Rr*r;
distanceon costa betweentips of Rr*, anC R, subequalto or longer than the latter.veinalone; R. gently arcuated; cell rst M, relatively small; ,rr-ru somewhat
variablein position,always beyondthe fork of.M, f rom one-sixthto more than
one-half its own length.
Abdomen dark brown, the long tergal valves of the ovipositor light horncolor, the sternal valves paler.
Habitat.-Alberta.
Holotylte, g, Moraine Lake, August 2, rg23 (J. McDunnough).
Paratopotype,g, August 4, rg23.
R. ('t ) subcaodatobelongs to the .group containing cau.dataLundbeck(Greenland-Baffinland)and monticola Alex. (British Columbia), in which thebasalsectionof R, is distinctlypreserved.It dif fers lrom ntonticolain the larger
cell Rr, position of m-cu.and the more abundanttrichiation of the veins. It differs from the speciesI have determinedas being caud,ata(Signuia, Baffinland)in the atrophy of Scr. It is possible,however,that the true caud.ata(describedfrom SouthernGreenland,Lat.6ro, 5' N.) may be still a different species.It isquite evidentthat there are rather numerousspeciesof theseArctic and Subarctic
speciesof Rlmbdomastir.

Rhabdornastix (Sacandaga) subfascigern. sp.
General coloration graI, the praescutum with four brown stripes, the lateral pair very faint and poorly defined; wings gray, the stigma and seams along
the cord and vein Cu, brown i Rs very short, transverse, far remote from Rr,,
at wing-margin ; Rn longer than the spacebetween the fork of Rs and the origin of
R3.
LIale.-Length, about 5-5.5 mm.; wing, 6-6.8 mm.
Female.-Length,

about 7-8 mm.; wing, 7.5-8.5 mm.

Rostrum and palpi dark.

Antennae crark throughout. Head gray.
Pronotum blackish, gray pruinose; anterior lateral pretergites obscurevellow' Mesonotum brownish gray, the praescutum behind with four brorvn
stripes, the lateral stripes only poorly defined, the intermediate pair more distinct and widely separated; pseudosutural foveae and tuberculate pits black:cephalic portion of sclerite more uniformly gray. Pleura gray, including thedorso-pleural membrane. Halteres short. pale yellowish white. Legs with thefore coxae gray, the other coxae brightened apicallv; trochanters obscure yellow;
femora light brown, brighter at base, darkened outwardly; tibiae brown, thetipsnarrowly darker; tarsi dark brown. Wings with a grayish suf fusion, the basemore whitish; stigma, a seam along the cord and a similar seam along vein Cu,
in cell II light brown; a narrow and inconspicuous seam at outer end of cdl
rst M,; veins dark brown. Venation: Sc, close to the tip of Scr,. R. very short,transverse, only about one-half to two-thirds the distance on the costal margin
between veins Rr*" and Rn i Rn longer than the serial vein R"*r*. and R"*n (theTEIS CAIIADIAN ENTOIOIbCISf,

AUG., t997.

basatsectionof .R, beiry entirely atrophied); ttrcr oblique in position' b'ut lessso tlran in fucQer.
Abdomendark brownish gray, inclu'lir€ the hypopygium'
Hobitot-Alberta.
Hohtype, 6, Banff, August V, r9rl2 (C. B. D. C'arrett).
Aflotopotypo,I , August g, 1922.
Parato\otyfes, ro 6 9, July r&August 22, 1922,
R. (,f.) srDfcsc*lar is very simitar in its. g€neral appearanctto n. (,s.)
faseigerAlex. (California), diffcring in the details of coloration a$d venation,nrch-as the shorter ,Sc,and Rs and the less oblique rrbclr.