598 TRANSACTIONS OF THE 



tions placed longitudinally, a more obvious one on the lateral 

 margin, and another each side of the basal middle ; elevated line 

 of the posterior angles less than one-fourth of the length of the 

 lateral edge, but slightly elevated and obtuse : elytx*a depressed 

 from the suture to the middle ; tip denticulated. 



Length nearly one-fifth of an inch. 



Resembles geminafus, but its form is rather more slender, the 

 frontal punctures are obsolete, and the elevated line of the thora- 

 cic angles is much shorter and less distinct. 



12. A. COGITANS Weber. — The thorax is described to be 

 serrate ; but on close examination the edge will be found to be 

 entire, and the upper surface of the edge, or extreme margin 

 only, is serrate. The body is more dilated than in any other of 

 our species. 



[Belongs to Rhseboscelis Chevr. and was also described as B. 

 ignara Fabr. — Leg.] 



TRACIIYS F. 



1. T. TESSELLATA F. 



2. T. ovATA Weber, Obs. p. 7(3. 



Our species vary greatly or are very numerous. 

 [These species belong to Bnuhi/n. — Lec] 



METONIUS Say. 



Thorax short, wide, and deeply emarginate before for the re- 

 ception of the head : not lobate behind : antennae subclavate, 

 concealed when at rest in a groove of the thorax ; body short, 

 wide before and narrow behind : tibife angulated, and when at 

 rest the tarsi are applied to the outer edge : praesternum promi- 

 nent to the mouth, and behind applied evenly to the poststernum 

 by a transverse line. 



This genus differs from Traclnjs in the thorax being not lobed 

 behind \ in the praesternum terminating by a straight line ; by 

 the dilatation of the tibiae, &c. 



[This genus is the same as the subsequently described PacJiys- 

 celis Solier, which is united with Brachys by Lacordaire. — Lec] 



1. M. ovATUS nob. (Trachys) Ann. Lye. New York. — Those 

 who will retain this species in Trachys must change the name to 

 leevigatus, as the other is preoccupied in that genus. 



[Vol. VI. 



