THE WIIIKLMIK! IJKKTLI'.S. 241 



bronzed and finely reticulate; labrum rounded in front and ciliate; 

 sentellum invisible; elytra with nine slightly impressed striae which 

 are sometimes very indistinct. Front tarsi of males moderately 

 dilated and densely clothed beneath with papilla?, forming an elon- 

 gate, narrow brush. Four species are known from Indiana, while 

 another may occur. 



KEY TO, INDIANA SPECIES OF DINEUTICS. 



(/. Sides of thorax and elytra with a bronzed submarginal stripe; length 

 12-15.5 mni. VITTATUS. 



ad. Sides without submarginal stripe; length not over 11 mm. 



l>. Under surface uniform brownish-yellow. 474. DISCOLOR. 



1)1>. Under surface black or bronzed. 



c. Sutural angles of elytra rounded in both sexes; femora of male 

 toothed. 475. EMARGINATUS. 



cc. Sutural angles distinct in female; femora of male not toothed. 

 (/. Sutural angles of both sexes produced backward; tips of female 

 elytra feebly separated. 476. ASSIMILIS. 



tl<J. Sutural angles of elytra of male rounded ; those of female pro- 

 duced backward with the tips strongly separated. 



477. HORNII. 



D. ri I tut us Aube has a range which probably includes southern 

 Indiana, but it has not yet been taken in the State. 



474 (1534). DINEUTES DISCOLOR Aube", Spec. Gen.. VI, 1838, 784. 



Oblong-oval, moderately convex, narrowed in front. Above black- 

 bronzed, shining ; under surface brownish-yellow to straw color. Elytra 

 with side margins at outer apical angle and tips slightly sinuate, the 

 sutural angles weakly produced; femora of male with a triangular tooth. 

 Length 11.5-13 mm. 



Steuben, Kosciusko, Putnam and Martin counties ; very common 

 in East Fork of White River. June 26-September 3. Easily 

 known by the narrower front half of body and pale under surface. 



475 (1538). DINEUTES EMARGINATUS Say, Trans. A-rner. Phil. Soc., II, 1823, 



108 ; ibid. II, 519. 



Rather broadly oval, moderately convex. Above black or blackish- 

 bronzed, not very shining ; beneath black, very shining, slightly bronzed ; 

 middle and hind legs, narrow margin and tip of abdomen, paler. Side 

 margins of elytra in male, not in female, slightly sinuate near tips; sutural 

 angles broadly rounded. Length 10-11 mm. 



Pond near University farm, east, of Mitchell, Lawrence County : 

 scarce. August 7. Probably throughout the southern half of 

 State. 



