THE SHOET- WINGED SCAVENGES BEETLES. 



435 



e. Elytra bronzed brown, the tips narrowly pale, more widely to- 

 ward sides; wider than bead, finely and very sparsely punc- 

 tate. 833. DENTATUS. 



ee. Piceous black : elytra scarcely at all paler at tip, not wider than 

 bead, rather closely punctate. 834. biakmatus. 



cg. Labrum with four teeth, the outer pair very small, the inner pair 

 short, broad and widely separated ; surface very finely and densely 

 punctate; head rounded behind; presternum strongly carinate. 



TRISTIS. 



S. opaculus Lee.. 4 mm. in length, has been taken at Cincinnati, 

 and S. rudis Lee, 4.5 mm. in length, in Illinois. 



832 (2554). Stilicus angularis Erichs., Gen. Spec. Staph., 1840. 634. 

 Dark reddish-brown, shining; elytra with tips 



pale ; abdomen piceous ; legs pale yellow. Head as 

 wide as long, broadly rounded and subtruncate at 

 base, coarsely and densely punctate, the punctures 

 rounded, shallow, each bearing a minute hair. Tho- 

 rax but little longer than wide, three-fourths as 

 wide as head, the obtuse angles at apical third dis- 

 tinctly rounded; disk sparsely and coarsely punc- 

 tured on sides with a broad smooth median line. 

 Elytra one-half wider and one-third longer than tho- 

 rax, finely and sparsely punctate. Abdomen nar- 

 rower at base than elytra, minutely and rather 

 closely punctate. Fifth ventral of male feebly flat- 

 tened, its apex truncate without a tooth. Length 

 3.8-4 mm. (Fig. 164.) Fi s- 164 - (Original.) 



Marion, Monroe, Lawrence and Spencer counties ; scarce. April 

 12-Jnly 29. Occurs beneath carrion and leaves. 



833 (2556). Stilicus dentatus Say, Trans. Amer. Phil. Soc, IV, 1834, 



457; ibid. II, 573. 



Head, thorax and elytra dark reddish-brown, the elytra strongly shin- 

 ing; abdomen black; antenme reddish-brown; legs and tips of elytra pale 

 yellow. Head longer than wide, strongly rounded at base, its punctures 

 elongate and dense. Thorax three-fifths as wide as head ; disk with length- 

 wise wrinkles, the median smooth line very narrow, forming an obtuse 

 carina. Elytra three-fourths wider and a third longer than thorax. Ab- 

 domen at base narrower than elytra, thence gradually widening, surface 

 shining, finely and sparsely punctate. Fifth ventral of male with a me- 

 dian tooth. Length 3.7-4 mm. 



Putnam, Marion and Posey counties ; scarce. March 20-Novem- 

 ber 28. Taken by sifting damp leaves and in fungi. 



834 (2557). Stilicus biaematus Lee, Trans. Amer. But. Soc, VIII, 1880, 



17S. 



Piceous black. Elytra scarcely at all paler at tip; antenme and legs 

 dusky yellow. Head as wide as long, its base broadly rounded, surface, as 



