16 G Canadian Arctic Expedition, 1913-18 
and posterior orbits more or less, the pronotum broadly, the parapsidial furrows 
more or less, an indefinite spot on the mesoscutellum, each axilla, and the lateral 
parts of the mesopostscutellum, a large spot on the mesopleura, the knees, the 
tibiae, the tarsi variable, and the caudal portion of the abdomen more or less; 
the labrum and clypeus yellow. Length, 6 mm. 
Demarcation point, Alaska. "Collected as pupa in cocoon in moss on 
tundra May 14, 1914. Imago emerged June 23, 1914. Breeding Record 12a." 
F. Johansen, collector. Specimen No. 148. 
This species is related to orbitalis Marlatt. The black tegulse, the large 
median fovea, and the form of the frontal crest will separate it from this species. 
Atnauronematus varianus, n. sp. 
Female. — Head with the inner orbits slightly roughened, otherwise polished 
and setaceous; the clypeus narrowly, deeply, roundly emarginate, the clypeal 
lobes narrow, angular, and rounded; the antennal furrows broad and deep 
from the pretentorinse to the caudal margin of the head, which they interrupt, 
linear at bottom caudad of the lateral ocelli, not so deep on the middle of their 
length; the ocellar furrow broad'and deep, V-shaped, connected with the antennal 
furrows; interocellar furrow deep, extending from the median ocellus to the 
ocellar furrow; the ocellar areas broadly convex; the frontal crest elevated 
above the ocellar areas, its dorsal surface abrupt, deeply interrupted on the 
meson by a deep linear furrow, the furrow continuous with the median fovea; 
the supraclypeal area strongly convex; the ocellar basin shallow, extending 
from the interrupting furrow of the frontal crest to and around the median 
ocellus to the interocellar furrow; the postocellar area strongly convex, short 
and broad; antennae roughened, finely setaceous, the fourth segment slightly 
longer than the third; the thorax polished throughout and setaceous^; the wings 
hyaline, the stigma and costa pale, the veins brownish; the claws deeply cleft, 
the inner ray about one-half the length of the outer; the abdomen polished and 
setaceous; the saw-guides broad, the ventral margin convex, the distal end 
bluntly pointed at middle; colour black with the following parts infuscated 
brownish: the distal one-third of the femora, the tibiae for the most part, the 
proximal portion of the tarsi, and the proximal part of the saw-guides. Length, 
6-5 mm. 
Male. — The male differs from the female in having the head more coarsely 
punctured, the emargination of the clypeus broader, the clypeal lobes angular 
and pointed, the ocellar basin less distinct, the prothorax and mesopleura densely 
pitted, the dorsal aspect of the mesothorax not so densely pitted as the pro- 
thorax; the fourth segment of the antennae distinctly longer than the third; 
the procidentia long and broad, the. sides nearly straight, and the caudal end 
truncate; the legs w-ith paler parts much lighter, the dorsal and ventral portions 
of the caudal segments of the abdomen pale. Length, 6 mm. 
West of Konganevik, Camden bay, Alaska, June 27, 1914, the date borne 
by the specimens. F. Johansen, collector. Specimens No. 524, 525. 
This specimen runs to rapax Cresson by Marlatt's table. The sharply 
defined ocellar basin will distinguish it. 
Amauronematus aulatus, n. sp. 
Female. — Head not punctured but irregularly, obscurely roughened or 
finely graiiular; the clypeus polished, roundly and rather shallowly emarginate, 
the clypeal lobes broad, angular, and rounded; the labrum polished and rounded; 
the antennal furrows deep depressions from the pretentorinae to near the middle 
of the cephalic aspect, where they are interrupted for a short distance, then 
broadly depressed to the lateral ocelli, linear and divergent caudad of the lateral 
