STAPHYLINID^:. 81 



Subgenus Homalotusa Csy. 



Atheta (Homalotusa) manitobae n. sp. Nearly black to piceous-black 

 throughout, the legs pale, somewhat shining, the micro-reticulation fine 

 but rather strong, not transversely strigilate though somewhat feebler 

 on the abdomen; vestiture moderately long, rather dusky, the punctures 

 very fine, moderately close, numerous and a little more asperate on the 

 abdomen; head small, but little wider than long, two-thirds as wide as 

 the prothorax, the eyes moderately prominent, at a little less than their 

 own length from the base, the tempora behind them slightly less promi- 

 nent, at first straight and parallel, then rapidly oblique to the base, the 

 carinae moderate, entire; antennae long and very slender, piceous-black, 

 barely at all paler basally, very moderately incrassate distally, the first 

 three joints equal in length, the first thickest, fourth much, the ninth 

 slightly, longer than wide, tenth as long as wide, the last scarcely as long 

 as the two preceding, gradually pointed; prothorax two-fifths wider than 

 long, parallel, with feebly arcuate sides, which become a little more 

 rounding and converging at apex; elytra slightly shorter than wide, 

 subparallel, a fourth wider and a third longer than the prothorax; ab- 

 domen parallel, with nearly straight thin margins, slightly narrower than 

 the elytra, the fifth tergite a little longer than the fourth. Length 3.3 

 mm.; width 0.82 mm. Manitoba (Aweme), Griddle. 



A distinct species, perhaps nearest to oregonina, but differing in 

 its smaller head, larger prothorax and more slender antennae. 



Atheta (Homalotusa) coloradensis n. sp. Rather slender, moderately 

 shining, black or in part slightly picescent, the elytra pale piceous-brown, 

 gradually broadly and very indefinitely infumate suturally except 

 apically, the legs pale; punctures very fine, not dense or asperate, sparser 

 and more asperate on the abdomen, where the micro-reticulation is very 

 fine, feeble and in close wavy transverse strigilation; elsewhere fine, 

 polygonal and moderately strong, the pubescence rather long; head as 

 long as wide, fully two-thirds as wide as the prothorax, parallel and 

 evenly rounded at the sides, the eyes not prominent and at fully their 

 own length from the base, the tempora evenly rounded, gradually con- 

 verging basally, the carinae feeble, not quite entire; antennae long, slender 

 and pale basally, gradually distinctly incrassate and piceous distally, 

 the second joint evidently longer than the third, fourth to sixth longer, 

 seventh to tenth more or less evidently shorter, than wide, the last oval, 

 pointed, not quite as long as the two preceding; prothorax barely a 

 fourth wider than long, parallel, with feebly arcuate sides and rounded 

 base; elytra rather short, nearly a fourth wider, though barely a fifth 

 longer, than the prothorax; abdomen parallel, slightly narrower than 

 the elytra, broader than the prothorax as usual, the fifth tergite a third 

 longer than the fourth, Length 3.85 mm.; width 0.9 mm. Colorado 

 (Red Cliff), Wickham. 



Differs from mormon in its more rounded sides of the head, larger 

 but less prominent eyes, thicker and much more incrassate antennae, 

 T. L. Casey, Mem. Col. II, August 1911. 



