:U2 FAMILY XL STAPHYLINID^E. 



V. HOMALOTA Mannh. 1SW. (O., "a fiat surface.") 

 To this g"iius. :is characteri/.ed in the key. belongs one Indiana 

 species. 



639 (2008). HOMALOTA PLAXA Gyllli., Ins. Suec., I, 1810, 402. 



Elongate, slender, parallel. Piceous, opaque; antenna, elytra and last 

 dorsal segment of abdomen brownish ; legs dull yellow. Head large, its sur- 

 face densely and rather coarsely punctate. Thorax slightly wider than 

 head, one-fourth narrower at base than apex; sides rounded, disk finely 

 and densely punetale and with a distinct median impressed line. Elytra 

 one-third wider and ab.iut one-half longer than tin -rax. densely and rather 

 coarsely punctate. Abdomen as long as the rest of the body, slightly nar- 

 rower than elytra ; its sides parallel and of equal width to terminal seg- 

 ment. Length 2.5-2.8 mm. 



Maiicn and Putnam counties; scarce. February 4- December 7 

 Taken by sifting moist vegetable debris. 



VI. LEFT us A Kr. 1858. (Gr., "slender.") 



Elongate, slender parallel forms having the antennte rather 

 short, head moderately large, thorax usually narrower than elytra 

 and slightly narrower at base than apex. 



KEY TO INDIANA SPECIES OF LEPTUSA. 



(i. Abdomen in great part pale. 



b. Thorax and elytra uniform brownish-pieeuus. much darker than the 



base of abdomen. 640. CASEYI. 



bb. Thorax and elytra reddish-yellow, or of the same hue as the basal 



portion of abdomen. 641. ELEGANS. 



mi. Abdomen, as well as thorax and elytra, dark brown or piceous. 



642. OBSCURA 



640 ( -). LEPTUSA CASEYI Feny., Eiitoin. News., XVIII, 1907, 61; tri- 



color Casey, Trans. Acad. Sci. St. L., XVI, 1906, 351. 

 Slender, parallel, convex. Uniform dark brown or piceous, subopaque : 

 abdomen pale reddish-yellow the fourth and fifth dorsal segments in part 

 or wholly piceous ; antenna? black, paler at base and tips ; legs pale. An- 

 teume longer than head and thorax, the second and third joints elongate 

 and subequal, the outer joints broader than long. Thorax a third wider 

 than head and two-fifths wider than long ; surface rather coarsely, densely 

 and shallowly punctate. Elytra slightly wider, one-third longer and more 

 deeply and roughly punctate than thorax. Length 2.5-3 mm. 



Putnam (Vunly; rare. April 22. Taken by sifting. This is 

 Casey's tricolor described from Iowa and Cincinnati. Ohio. Fenyes, 

 loc. cil., showed that Casey's name was preoccupied. 



V 



t'41 ( ). LEPTUSA ELEGANS sp. nov. 



Form of caxei/i, but a little more slender. Reddish-yellow, shining, 

 sparsely clothed with very line prostrate hairs; head, middle joints of an- 



