10 G Canadian Arctic Expedition, 1913-18 



shallow, connecting with the antennal furrows -and a broad shallow interocellar 

 furrow: post ocellar area broad and short; the ocellar areas prominent, sharp 

 ridges continuous with a prominent uninterrupted frontal crest, the three 

 bounding a deep ocellar basin extending to the median ocellus; antennal plates 

 thin and prominent with an interrupted crestal furrow dorsad of them; median 

 fovea deep, elongate, punctiform, connecting with a larger round punctiform 

 depression in the ventral part of the frontal crest; the supraclypeal area convex; 

 the antenme arc wanting beyond the second segment; the pronotum finely 

 punctate and setaceous; the median and lateral lobes of the mesonotum finely 

 granular and sparsely setaceous, the median lobe with a mesal carinate depres- 

 sion; the mesoscutum polished; the mesopostscutellum with the mesal portion 

 polished and each lateral portion finely roughened; the metascutum roughened; 

 the wings more or less infuscated, the stigma and the veins including the costa 

 brownish; the claws cleft, the inner ray shorter and stouter than the outer; 

 the abdomen densely finely granular, sparsely setaceous; the saw-guides stout, 

 the dorsal and ventral margins strongly converging, the distal end bluntly 

 pointed; colour black with the tegulae yellowish and the legs beyond and 

 including the knees strongly infuscated yellowish. Length, 4 mm. 



Chantry island, Northwest Territories. August 16, 1915. Specimen No. 

 132F. The labels of the specimen read as given. Mr. Johansen informs me 

 it should be labelled Bernard harbour and not Chantry island. 



This species runs to atriventris Marlatt by Marlatt's table. The prominent 

 uninterrupted frontal crest will differentiate it. 



Pontania quadrifasciata, n. sp. 



F KM ALE. -Head sparsely coarsely granular, the granules elongated to fine 

 ridges in certain parts; the clypeus broadly, shallowly, roundly emarginate, 

 the clypeal lobes broad and angular, margin rounded; the antennal furrows 

 deep on the ventral and dorsal portions, not interrupting the caudal margin of 

 the head, the furrows broad and rounded opposite the median ocellus; the 

 ocellar and interocellar furrows forming a distinct Y-shaped depression connected 

 with the antennal furrows; the ocellar areas rounded elevations not connected 

 with the frontal crest; the frontal crest not interrupted, almost wanting 

 except between the antennal fovese where it forms an elevation continuous with 

 the subconvex supraclypeal area; the median fovea an elongate punctiform 

 depression, twice as long as wide; the ocellar basin distinct, concave, extending 

 from the frontal crest to the median ocellus; antennae wanting beyond the second 

 segment; the pronotum, the median and lateral lobes of the mesonotum, the 

 mesoscutellum, the mesopleura, the mesosternum, and the metapleura polished 

 and setaceous; the mesopostscutellum and metascutum polished and not 

 setaceous; the wings hyaline, tttie stigma and part of the costa pale, the veins 

 brownish; the abdomen polished and sparsely setaceous; the saw-guides broad, 

 the dorsal margin straight, the ventral margin convex and curving dorsad to 

 th<- dorsal margin, forming a long oblique distal end, the dorsal part of which 

 < bluntly pointed and densely setaceous; the cerci long and slender, reaching to 

 1ll(> ( ' I1(1 <> f tjl(> saw-guides; colour black with the following parts yellowish: 

 the clypeus and labrum, the mandibles, the malar space, extending for a short 

 distance on the inner orbits, the outer orbits; an elongate spot caudad of each 

 compound eye, the pronotum broadly, the tegulse, two spots on the cephalic 

 part of tin- mesoscutellum, a spot on each mesaxilla, a large triangular spot on 

 the mesopleura, the leg- except ihe proximal part of the cox and the troch- 

 anters in part, the proximal half of the femora and the tarsi more or less infus- 

 cated, the ventral aspect of the abdomen and the last tergum; the saw-guides 

 dark brownish. Length, (j mm. 



