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, mesostern^im, 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 tibise, the 
tarsi except the distal segments of the metatarsi more or less above, and the 
caudal abdominal sternum. Length, 7 mm. 
Colhnson point, Alaska, June 20, 1914. F. Johansen, collector. Specimen 
No. 1166. 
This species is related to horealis 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 clj^peus 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 lalarum broadly rounded 
and polished; the antennal furrows deep broad depressions adjacent to the 
pretentorinse 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 supraclypeal 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 I'ounded, 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 
