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 

 tibise, 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. 



Amauronematus varianus, n. sp. 



r 



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 

 mes6n 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 tibise 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 with 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 ra-pax 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 granular; 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 frorn the pretentorinee 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 thq lateral 



