14 g Canadian Arctic Expedition, 1913-18 



strongly convex; the antennae roughened by closely placed fine pits, setaceous, 

 the third segment distinctly shorter than the fourth and slightly shorter than 

 the fifth; the prothorax, the median and lateral lobes of the mesonotum, the 

 mesopostscutellum, and the mesopleura for the most part finely densely 

 punctured; the mesoscutellum, mesosternum, and metapleura polished with 

 sparse punctures; the wings hyaline, the stigma and the costa pale, the veins 

 brownish; the stigma triangular in outline, the caudal margin almost straight; 

 the claws deeply cleft, the inner ray subequal in length to the outer; the abdomen 

 finely granular and setaceous; the procidentia long and truncated at the caudal 

 end, and constricted at the cephalic end; the colour black with the following 

 parts brownish: the labrum, the distal portion of the femora, the tibiae, the 

 tarsi except the distal segments of the metatarsi more or less above, and the 

 caudal abdominal sternum. Length, 7 mm. 



Collinson point, Alaska, June 20, 1914. F. Johansen, collector. Specimen 

 Xo. 1166. 



This species is related to borealis Marlatt from which it can be separated 

 by the difference in the form of the median fovea and ocellar basin. 



Amauronematus indicatus, n. sp. 



Male. — Head, the crypeiis and labrum, finely densely punctured, the 

 punctures tending to form rugosities; the clypeus deeply roundly emarginate, 

 the clypeal lobes large, angular, rounded at apex; the labrum broadly rounded 

 and polished; the antennal furrows deep broad depressions adjacent to the 

 pretentorinae and the dorsal part of the antennal fossae, broad rather shallow 

 but distinct furrows between these depressions and the lateral ocelli and the 

 uninterrupted caudal margin of the head; the ocellar and interocellar furrows 

 broad, deep, rounding furrows, the former connecting with the antennal furrows; 

 the postocellar area strongly convex, its cephalic margin rounded; the portion 

 of the ocellar areas bearing the lateral ocelli slightly elevated and continuous 

 with the strongly elevated uninterrupted frontal crest; the ocellar basin distinct 

 but shallow, extending from the frontal crest to the median ocellus; the median 

 fovea a large subquadrangular depression ; the supracly peal area strongly convex ; 

 the antennae roughened by closely placed fine pits, setaceous, the third segment 

 shorter than the fourth; the prothorax, the median lobe of the mesonotum, the 

 mesopostscutellum, and the metapleura in part finely densely pitted; the 

 lateral lobes of the mesonotum, the mesoscutellum, the metascutum, and the 

 mesosternum polished, sparsely pitted; the wings hyaline, the stigma pale, 

 the veins, including the costa, brownish; the claws deeply cleft, the inner ray 

 distinctly shorter than the outer; the abdomen polished and setaceous; the 

 procidentia concealed; the colour black with the following parts brownish: the 

 labrum, the distal portion of the femora, the tibiae, the tarsi, and the caudal 

 end of the abdomen. Length, 6-5 mm. 



West of Konganevik, Camden bay, Alaska, July 4, 1914. F. Johansen, 

 collector. Specimen No. 521. 



This species is very similar to completus. The difference in the antennal 

 segments and the clypeal emargination will distinguish them. 



Amauronematus digestus, n. sp. 



Female. — Head finely roughened, sparsely setaceous; the clypeus polished, 

 narrow and shallowly emarginate, the clypeal lobes minute and rounded; the 

 labrum polished, long and broadly rounded, and setaceous; the antennal 

 furrows deep from the pretentorinae to the middle of the cephalic margin, 

 broad distinct furrows from this to the lateral ocelli, and deep linear furrows 

 interrupting the caudal margin of the head; the interocellar furrow a broad 



