ilt!
TII4

LVIII.

Excerpt

fromCanatiian

CANADIAN

Enroll:ologist.

ENTOMOLOGISTDecember,

14/2b1926.

DIPTERA COLLECTED BY THE LATE ALLAN CRAWFORD ON
WRANGEI, ISLAND.+BY C. II.

CURRAN AND

C. P. AI.EXANDER,

Among the effects of the late Allan Crawfold, found when the relief shipreached the island in 1924, were some insects contained in alcohol. The Dipterous insects 'have been forrvargled for determination and there are representativesof five species. Of these only six specimensare sufficiently well preserved to permit o{ determination, the remainder being so fragmentary as to permit of onlv
a guess as to the genus to which they belong. Dr. C. P. Alexander thas been kindenough to report upon the Tipulidae. In addition to the specimens examined byhim there are fragments of a small speciesprobably belonging to the Lrmnophilinae. The specimens determined rvill be mounted in the usual manner after be*-Contribution
from the Division of Svstematic Entornology, Entomologicat Branch, Deptof Agric., Ottawa.

THE CANADIAN290

ENTOMOLOGISTDEc., 1926.

ing hardened in xylol, thus making them more available'"collections
the speciesareof Arctic Diptera are of unusual interest as rllany ofare most frespecies
palaearctic
holarctic and it is in far northern America thatfamilies ofthreeoffound. The collestion contains representatives
q"*,ryDiptera.
(eNtuolrvroAE
MUSCTDAE
HYlemYia sP.

aLlct)

T wof em ales inp o o rc o n d i ti o n a p p e a rto b e l o ngtothi sgenus.Theyare
but the squanlae
however more robust than usual and rather suggestHydrophorio
there aremissing,areTireantennaelength.
are of approximately the san-retinged lvith yello.lv,
four posterior dorso-centrals and the wings are conspicuously
pollenalthough this mayoffreeunusuallyrvhile the thorax and abdomen are
be due to their immersion in alcohol'
HEL OM YZ IDAE

OecotheaHallidaY
Arctic region of An.rerThree speciesbelonging to ti-ris genLlsoccuf in tl-re
ica and are seParableas follows
clouding; posterior forceps cf
r. Small crossveinwith conspicuousdark brown
half or more except later6 rounded apically; scuiellum blackish on basal
fi'd'elis n' sP'allyforceps are.
posterior
if theSmall crossvein at most inconspicurouslyclouded;
ro t r ndedapic ally t.h e s c u te l l u rrri s o n l y a l i ttl e darkerredbasal l y,mostl y" " 2'yellow
2 .L a rg es pec ies ; pos te ri o rfo rc e p s o fs b ro a d ,tra n sverseapi cal l y;scutel l um
" " ' ar'i'stalis Malloch"
blackish on discSm aller , under . 4.5 m n l .' p o s te ri o rfo rc e p s ro rr ndedapi cal l y;scutel l urnusual l y" " ' fcnestral i sFal l en'a l m os t all y eilow ...' .::" " " " " :Oecotheafidelis Curran, n. sP'

Ver y s inr ilar t of e n e s tro /i s b u tth e a n te ri o rc r ossvei ni scl oudedw i ti r
longer and murch coarser' tl,e scu'tellu'r isbrown, the smail f rontai hairs areforceps longer' Length 3'5 to 5 mn]'strongly bicoiorous, the iused posterior

Fic'A

gerritalia;p'f' posteriorforceps'
Oecolheafidelisn. sp. Fig. A' Ventrarlview of 6
M ale. Headr ed d i s h ,w h i ti s h o rg ra y i s h p o l l i nose' theocci putrvi ththree
giound color; .{ront with a broad
short vertical projections forwards, blackistr incufves inwards to fuse or almost
brownish stripe on each side of the ocelli whichbroad paiefrom the ocelli.to the antennae' leaving a;oir, *or. than half way
redAntennae
Palpi reddish yellow'
area surrounding the b,o'"" ocellar triangle'
pubescent',disl,, the third segmentmostly brown;arista brown'
calli latgel-v and thepostefior
hutneri,theThorax black in gto.rr.,l color,LVIII.

T116 CANADIAN$NTOMOLOGIST

29r

scutellum on its broad border, yellowish;- thorax
thick grey or yeilowish grey
pollinose, the mesonotu' with three verybroad, irregular" darker vittae giving asomewhat mottled appearance. Four dorso-centrals,
one presutural, one humertwo notopleural, one supra-alar, two post-callarand one sternopleural; scutel.1J,
lum with two pairs of strong ruarginals and numerous
short discal rhairs.
Legs dark reddish, the femora brownish except the baseand broad apex.
Ivliddle femora anteriorly with a row of fairly
strong urisit.s for more thanhalf their le'gth, but broadly separated from trre
the upper edge and"p"*,1"".
with a rorv of slightly weaker bristles on the apical-haifin the middle, the lower
and strong, the postero_ventral bristles forming acomplete more or:^r-y::iqt*eress ooublerow.
Wings yellowish tinged, especiallv torvards thebase; anterior crossvein
rvith conspicuous bro*'n cloud. Squamae andrrarteresyeflow, trre former withrvhite fringe
Abdomen blackish, densely br:ownish grey pollinose,
the ge'itaria reddish,from ventral view appearing as in fig. A.
Fennle. The color is the same but the bristles
on the middle femora areweaker.
Holo\rpe-6,Allotltfe-g,
and a paratype of each sex; No. z34r rn theCanadian National Collection.
,TIPUI.IDAD

The collection of Tipulidae consists of a single
vial containing three imperfect specimens' one of r','hich is headlessand cannot be deterrnined. Fronr
its general 'habitus this latter speciurenmav pertain
to either of the genera Tip,taor Prionocero. The remaining specimensrepresent
the two sexes of an undescribed speciesof the genus Tipula that is characterizedherewith.
The writer l.ras recently sur.marized our knowledgeof the crane_flieso,f the Arctic Region (Report of the Scientific
Results of t1.,".Norwegian Expedi_tion to Novaya Zenlya, r9zr. No.
5. The Crane_flies,pp.9_r5;rgzz). To
the bibliography of Arctic crane-flies given at thattime, ti-,e rouowirrg additionalreference and emendations should be girren:
Alexander,Charlesp.
1923. Diptera of_the prirbirofIslands,Ar-a^sk_a-.
(Tipuridaeand Rhyphidae). NorthAnrerican
46: 159_169,pfs. tO_ti.
1924. Report of-Fauna,
the SecondNo.*e!ilttExperlitio' in the ,,Fram,,,lggg_1902. Norsk Entomol.Tidsstr] 1 : Ar;rtr
296_297.
Lunostrom.
U.
'Dipter-a-Nematocera
1918.
aus. rlen Arctischen Gdgendtn ,siberiens. Resultats
scientifiquesde IExpeditio, poiiii.--n;;;. ;_;'jfrblisii:,,ou. ra Direction
E. Tot. Siction-E,-z".i"giq-"."r z L{;;. 'eii'-ls,
ir.r -t."**"
Ri.der, M.'tF.Barori1919. Resultats^scientifiqrre-s
de I'Expe<lition-cles
freres I(u.znecov'al.Ourel,Arctique en 1909,sousla-directiondi H. Backiincr.
p"ry***
N;;;;;;;;
rri"-.
Acad. Sci. Russ.,(8) 2g: l_10,figs.
-Tipula crawfordi Alexantlcr, n. sp.

Belo'gs to the chterocca group; wings rvhitish subhyarine,with a pare
bro'*'n pattern;hypopygi'm rvith the outer clististyle cvlindrical.
'raleMob.-Length
about lo mm. Feruale._Length about 15 mm.; wing.
about r3.5 rnm.
Coloration describecl fronr alcoholic specinrens.

292

TH4CANADIANENTOMOI.OGISTDEC., 1926.

Head and thorax blackish, in dry specimens presurnably wit'h a grey pruinosity, Affiomen obscure reddish, with a narrow dark line on either side and apaler, more dif fuse dorso-median vitta, more evident in the female; caudal margins of the tergites narrowly ringed with darker; in the male, abdominal segments
beyond the fifth passing into brownish black.
Frontal prolongation of the head relatively stout, the nasus entirely lacking, as in the group. Antennae with the scapal segments black, the first segment
relatively short and stout; flagellum broken.

fY',Fig.ITipula
crawfortli n. sp. Fig. 1-Ninth tergite, dorsal aspect; Fig. 2-I\4ale lrypgpygrlgr,
lateral aspect; D-basistl'le; r'-inner dististyle; o-outer dististyle; s-sternites 7-9;t-tergites 7-9.
Thorax with the dorso-pleural membrane pale. Legs rvith the coxae andtrochanters black, probably pruinose in dry specimens; all o{ the, legs are bfoken
and detached, those presumably pertaining to this species being relatively stout,
the femora and tibiae reddish fuivous, the femora broadly, the tibiae more narrowly, tipped with brownish black; tarsi gradually passing into biaclr. \,Vings detached, but almost certainll' pertaining to this species: Whitish subhyaline witha sparse, pale brown pattern, arranged as foliows.-A cloud near mid-length ofvein Cu' occupying cells I/ and Cu; a cloud in the outer end of cell M, crossing
tn-cu,into cell Mn; stigma infuscated; clouds at origin of Rs and on tire anteriorcord, the latter confluent with the stigmal area; wing-apex weakly but extensively
infuscated; veins dark brorvn. Ven:rtion: Distal section of vein R, pale but entire; cell rst M" relativelv small, pentagonal; celTMr longer than its petiole; veinznd A straight.
Apex of the abdomen strongly upturned. Male hypopyglum of relatively
simple structure. Ninth tergite (Fig. r) only moderately chitinized, not blackened; caudal margin with a broad and relatively shallow U-shaped notch, the baseof the emargination with a second microscopic notch; lateral angles of the tergite broadly truncated, the mesal-apical angle of each a little produced. Basistyle (Fig. z, b) complete,more reddish in color than the stetnite, appearing rough1y triangular in'outline with the apex evenly rounded. Outer dististyle (o) cylindrical, the distal half blackened, the surface of the styie with microscopic palesetae. Inner dististyle (i) a broad, pale yellow; very conpressed blade, the caudal
margin with a fringe of delicate setae; apex of the style split into two appressed
lobes that are blackened, their tips obtusely rounded. Ninth sternite (9s) with a'median notch, the base filled with membrane. Eighth sternite (Bs) unarmed.
,Ovipositor with the teqgal valves long and slender, the margins smooth. 'The:sternal valves are a little shorler but n-ruchdeeper, compressed,tl-retips subobtuse.

LVIII.

TED

CANADIAN

ENfOMOLOGIST293

Holotype, 6, Wrangel Island, S,iberia (I,atitude about Z5.ro N.). Collectedby Allan Crawford; No. z34z in the Canadian Nationa,l Collection.
Allotype, g, same data
The crane-fly is named in honor of the collector, Mr. Ailan crawford, whoperished from starvation on Wrangel Island, due to the inability of relief ships
to reach him.
Tipula crawf ord,i belongs to a small group of Arctic Tipula that I havecalled the cineracea group, distinguished by the simple male hypopygium and thecomplete lack of a nasus. The two fully-winged species that agree closest withthe present form are T. cineracea Coquillett of Alaska (Froc. Washington Acacl.
Sci., z | 4o4t rgoo) and T. hatmaiensis Alexander, of Katmai, Alaska (OhioJourn. Sci., zo i 2o2-2o3; rgzo). If the detached wiqg in the vial actually belongs to the present species, as seems to be the case without any question, thefly is readily told by the pictur,ed wings.s The two subapterous species of thesame group, T. zahitneyi Alexander of the Pribilof Islands, Aiaska (North American Fauna, 46: 16r-163; rg4)
and T. gynaptera Alexander from Plover Bay,
Siberia (Tourn. N.Y. Ent. Soc., z6: Z2-23; rgi8) are very distinct.