198 PROCEEDINGS ENTOMOLOGICAL SOCIETY 



common species might have been discovered and made known 

 long ago; but I have failed to find any genus in the literature 

 at my disposal which would even approach this most remark- 

 able member of the Aleocharime subfamily. Il is barea 

 possible that the genus has been placed by a previo-.is 

 author in some other staphylinid subfamily: if so, it cer'ainlv 

 ought to be transferred to the Aleocharinse, as the position of 

 the antennae and the form of the anterior and posterior coxa? 

 do not admit of any other interpretation. 



The size and frrm of the mandiblrs a'rl the c^traor- 

 dinary, toothed labium ( provided I interpreted correctly 

 my dissected specimen) are, to my knowledge, unique in the 

 subfamily. 



Gnathusa eva, spec. nov. 



Robust, stout, subparallel, moderately shining, with somewhat 

 coarse, sparse pubescence. Head black ; prothorax scarcely a little paler, 

 elytra piceous black, sometimes almost black. Abdomen black. Anten- 

 na? entirely reddish brown. Femora piceous ; tibia? and tarsi reddish 

 brown. Antennae rather short, scarcely as long as head and pro- 

 thorax together, strongly incrassate toward apex ; joint 1 moderately 

 elongate ; 2 much longer than 3 ; 4 square ; 5 and 6 about equal ; 7-10 

 gradually strongly wider, 10 more than twice as wide as long; 11 

 oval, blunt, scarcely as long as 9 and 10 together. Head large. Inn 

 little narrower than the prothorax; extremely finely, sparsely punctate; 

 eyes about as long as the tempora ; gena? entirely margined. Pro- 

 thorax a little narrower than the elytra, strongly transverse, a little 

 more narrowed in front than behind, with a faint longitudinal basal 

 channel and a basal foveola ; finely, sparsely punctate, with 3 to 4 

 black marginal bristles ; epipleurse not visible from the side. Elytra a 

 Irttle longer than the prothorax, outer hind angles feebly emarginate : 

 roughly granulosely punctate, a little more densely than the prothorax. 

 Abdomen broad, wider at about the middle ; segments 3-5 transversely 

 impressed at base, before the impressions with a bisinuate bead : 

 segment 7 scarcely longer than 6: finely, very sparsely punctate to- 

 ward tip, with marginal bristles. 



Length 2.6 mm. 



Tahoe City, California; taken in abundance by sifting, also 

 in evening flight. 



Bolitochara unicolor, spec. nov. 



Elongate, moderately narrowed in front and behind, moderately 

 convex: somewhat shining, with long, fine, sparse, decumbent pubes- 

 cence; winged. Entirely dark to pale reddish yellow, joints 1-3 and 

 11 of the antenna? scarcely paler. Antenna- a little longer than head 



