AMERICAN PUILOSOPHICAL SOOIKTY. 583 



Inhabits Pennsylvania. 



Body black, with a slight piceous tinge, polished ; antenna; 

 dull [467] yellowish, dusky towards the tip; mouth dull yellow- 

 ish; pulpi iilitbrm; thorax pieoous on the lateral margin, gradu- 

 ally shading to the general blackish color ; elytra on the lateral 

 margin and at tip piceous; common edge of the tip not indentecl 

 at the suture ; tergum (in the preserveil state) much shorter than 

 the elytra, at tip of the segments dull jticeous ; feet honey-yel- 

 low ; tibiae not remarkably spiny. 



Length oue-twolfth of an inch. 



The abdomen contracts very much in desiccation. 



This can hardly be craasiis (Jrav., as his description does not 

 indicate it. 



[Considered by FIrichson as a Tachuius, but more recently 

 such species have been separated as a distinct genus Coproporus 

 Kraatz. — Lkc] 



5. T. OPicus. — Blackish ; feet, base of the thora.K and of the 

 elytra obscure reddish-brown. 



Inhabits Missouri. 



Body deep black brown, somewhat sericeous ; head black ; an- 

 tonnte at base and tip pale reddish-brown ; pali)i pale reddish- 

 brown ; thorax convex ; a narrow, obscure, red brown posterior 

 margin; elytra with a broad red brown ba.sal margin; feet red 

 brown ; tibia) not remarkably spinous ; tergum with paler margins 

 to the segments, shorter than the elytra, hairy at tip. 



Length over one-tenth of an inch. 



This species is not highly polished, but is distinctly sericeous. 



[Afterwards described as Conarna clnrtulus Er. — Lec] 



5. T. ACAUDUS. — Abbreviated ; honey -yellowi.sh ; thorax paler 

 each side. 



Inhabits Indiana. 



Body honey-yellow, polished ; head black piceous ; antenntu 

 fuscous, four basal joints obscure yellowish ; paljii yellowish, 

 last joint acieular ; thorax honey-yellowish, more dusky on the 

 disk and at base, and paler, somewhat tmnsluccnt on the lateral 

 margin ; elytra yellow with a rufous tinge, a little hairy, dusky on 

 the region of the scutel; tip of the suture a little rounded, so as 



1834.] 



