36 MEMOIRS ON THE COLEOPTERA. 



teeth nearly as in reposita but differing in character, the two lateral being 

 smaller and more slender and all the projections flat, not tuberculiform; 

 mesosternal process aciculate, not so long as in the preceding, separated 

 from the more angulate metasternum by a longer distance; tarsi similar. 

 Length 2.7 mm.; width 0.62 mm. Arizona (Tugson). 



Resembles reposita a good deal, but more slender and with dif- 

 ferences as noted in the description. It is probable that all the 

 species of this type are stercoraceous in habits. 



Atheta querula n. sp. Allied to the two preceding, stouter than in ostenta, 

 moderately convex, similar in coloration, rather dull, densely, finely and as- 

 perulately punctate, the abdomen shining, similarly strigilate; head similar, 

 the eyes convex, at about their own length from the base, the carinae fine but 

 distinct, similarly virtually entire though not actually joining the margin of 

 the buccal cavity; antennae similar, blackish throughout, rather thick, 

 moderately incrassate, the second and third joints equal, moderately elongate, 

 the outer joints distinctly transverse; pro thorax large, rather strongly trans- 

 verse, parallel and rounded at the sides, obsoletely impressed medially at base, 

 much wider than the head but only slightly narrower than the elytra, which 

 are wider than long, nearly parallel and much longer than the pro thorax; 

 abdomen but little narrower than the elytra, parallel basally, gradually 

 narrowing slightly behind the middle, the fourth and fifth tergites equal in 

 length, the sixth (a") with a slender and well developed process at each side 

 of the apex, and, at the middle, two small, somewhat reflexed and strongly 

 tuberculiform teeth, separated by about the same interval as either from the 

 lateral processes; sterna and tarsi almost exactly as in reposita. Length 

 2.7 mm.; width 0.75 mm. California (Calaveras Co.). 



Differs from ostenta in its stouter form and, from reposita, in its 

 more parallel form, relatively larger prothorax and less evenly 

 tapering abdomen. 



In the two following species the male sexual characters are al- 

 together peculiar: 



Atheta promota n. sp. Rather stout, subparallel, moderately convex, 

 blackish-piceous, the elytra but little paler, the legs and antennal base pale; 

 surface rather shining, minutely, not very closely and almost simply punctu- 

 late, except on the elytra, where the punctures are close-set and strongly 

 asperate; head moderately transverse, the eyes rather large, convex, at 

 evidently less than their own length from the base, the carinse fine, not quite 

 entire; antennae rather short, somewhat strongly incrassate distally, the second 

 and third joints elongate, equal and obconic, the outer joints very distinctly 

 transverse; prothorax large, transverse, parallel and well rounded at the sides, 

 much wider than the head but only slightly narrower than the elytra, finely, 

 feebly impressed along the median line and with a feeble ante-scutellar im- 

 pression; elytra moderately transverse, with straight and rather diverging 

 sides, much longer than the prothorax; abdomen parallel, evidently nar- 

 rower than the elytra, slightly narrowed apically, the tergites equal in length, 



