AMERICAN PHILOSOPHICAL SOCIETY. 505 



/ 



Body glabrous, beneath black ; head black ; antennse brown ; 

 base and palpi testaceous ; nasus and labrum piceous ; thorax 

 rufous, rounded behind, dorsal line distinct, continued to the 

 base, posterior lines excavated, dilated, and punctured, a few 

 obsolete punctures before ; elytra pale rufous or testaceous, some- 

 what darker on the disk, striae impunctured ; pectus rufous ; ster- 

 num black ; feet testaceous ; postpectus and abdomen black. [91] 



Very closely allied to the preceding, is less common, and is 

 distinct by the punctures of the thorax, by the less abrupt poste- 

 rior termination of that part, and by the consequent less obtuse 

 form of the angles. 



[A species of Stenolophus, belonging to my 4th division, Trans. 

 Am. Phil. Soc. 10, 386, and afterwards described as Acupalpus 

 paupercuhis and consimilis Dej. — Lec] 



3. T. RUPESTRis. — Head black; thorax dark rufous, punc- 

 tured at base, posterior angles not rounded, beneath black ; feet 

 testaceous. 



Length nearly one-fifth of an inch. 



Body glabrous, beneath black ; head black ; antennae brown j 

 base and palpi testaceous ; nasus and labrum deep piceous ; tho- 

 rax deep blackish rufous, gradually a little narrowed from before 

 the middle to the hind angles, which are slightly angulated, the 

 edge very slightly excurved at the hind angles ; elytra with im- 

 punctured striae, disk blackish, margin and suture dark rufous; 

 pectus piceous-black ; sternum black ; feet testaceous ; postpec- 

 tus and abdomen black. 



Var. a. Length less than one-tenth of an inch. 



Strongly resembles the two preceding species, but is suffi- 

 ciently distinct by the form of the posterior thoracic angles. 



It is highly probable that Var. a. is in reality a distinct 

 species. 



[A species of Bradt/cellus, afterwards described as Acupalpus 

 elo7igatuhis Dej., and Trechus flavipes Kirby. — Leg.] 



1828.] 



