AMERICAN PHILOSOPHICAL SOCIETY. 565 



punctures few, distant, almost to be traced into obsolete series ; 

 laterally with small punctures, furnishing short hairs ; tergum in 

 some lights slightly iridescent towards the tip; beneath very ob- 

 scurely piceous ; feet piceous. 



Length nearly three-tenths of an inch. 



The two dorsal series of punctures in other species diverge a 

 little posteriorly, but in the present species they evidently approach 

 towards their posterior termination. Fam. 1st. 



[Considered by Erichson as Quedius capucinus. — Leg.] 



6. S. DIMIDIATUS.— Blackish ; elytra and margins of abdominal 

 segments reddish-brown ; feet pale. 



Inhabits United States. 



Body piceous black ; head oval black, with two punctures be- 

 tween the eyes, two punctures on the posterior canthus and five 

 or six behind ; mouth piceous ; antennae, first and second joints 

 and part of the third yellowish, or reddish-brown, more or less 

 pale ; thorax black, with a tinge of piceous ; dorsal series five, 

 and an equal puncture more distant than the others, near the 

 anterior margin, and a little exterior to the line of the series; 

 lateral punctures two, or in a much curved line three ; marginal 

 two ; elytra reddish-brown, with prostrate hairs ; abdomen, seg- 

 ments reddish-brown on their posterior margins ; feet yellowish, 

 or pale reddish-brown. 



Length nearly one-fifth of an inch. 



I have found specimens in Pennsylvania and Missouri. The 

 reddish-brown color of the posterior margins of the abdomen is 

 obvious beneath. Fam. 1st. 



[A Philonthus, probably the same as the European P. ventralis. 

 — Leg.] 



7. S. TACHiNiFORMis. — Black; thoraxsanguineous; feetpiceous. 

 Inhabits Mexico. 



Body black ; head rather small, oval, polished ; with two punc- 

 tures [451] each side between the eyes, and eight or ten behind 

 the eyes ; antennae fuscous, dark piceous at base ; mouth piceous; 

 thorax sanguineous ; dorsal punctures five, distant from the base 

 and tip ; lateral two ; marginal three, placed triangularly ; elytra 

 with a slight, obscure metallic tinge, with numerous minute pune- 

 1834.] 



