AMERICAN PHILOSOPHICAL SOCIETY. 447 



Agra pensylvanica Edinb. Encyc. 



Drypta pensylvanica Lamarck, An. San. Vert. 4, p. 505. 



Body with a few distant hairs ; head black, destitute of punc- 

 tures, polished ; antennas, four basal joints rufous; thorax black, 

 with excavated punctures each side, which disappear near the 

 tips, a longitudinal impressed line each side above; feet pale 

 testaceous; knees dusky or black; tarsi, penultimate joint 

 entire ; elytra rufous, striate with punctures which are obsolete 

 behind the middle ; a large, common, longitudinally oblong-oval 

 black spot on the middle, and a common, transverse, terminal 

 larger one, which is connected by the black hind [17] margin 

 with a spot on the middle of the margin, which is also generally 

 connected with the common middle one ; venter glabrous, black, 

 often with a slight testaceous shade before. 



Not uncommon beneath stones, &c. Found also by Mr. T. 

 Nuttall on the Missouri. It has been referred to the gentts 

 Agra, but the palpi are decidedly those of Odacantlia as de- 

 scribed by M. Latreille. 



[Belongs to Casnonia. — -Leg.] 



2. 0. DORSALis. — Head black ; thorax rufous ; elytra testa- 

 ceous ; suture black. 



Length three-tenths of an inch. 



0. dorsalis Fabr. Syst. Eleut. 1, p. 239. 



Head black ; clypeus, labrum, mouth, and antennas rufous. 

 Thorax cylindrical, somewhat contracted before the base, punc- 

 tured ; punctures numerous, minute, sparse or wanting on the 

 disk; a longitudinal dorsal impressed line, and an obsolete, 

 dilated, dusky vitta on each side ; elytra yellowish-white, striate ; 

 striae regularly and distinctly punctured; a common blackish 

 sutural line, dilated before the tip ; pectus pale rufous ; feet testa- 

 ceous, tarsi, penultimate joint bilobate ; venter blackish. 



Inhabits the Southern States. 



This ought unqestionably to form a distinct genus from that of 

 the preceding species. 



[Belongs to LeptotracJielus. — Lec] 



1823.] 



