98 MR. HALDEMAN'S DESCRIPTIONS OF COLEOPTERA. 



ORCHESIA Lair. 



O. GRACILIS Mels. Proceed. Acad. iii. 57. Penn. and upper Mississippi. A 

 remarkable character of this genus, (at least as far as this species is concerned,) is 

 the oblique pectination of the posterior side of the long tarsal spines. 



DIRCtEA Fahr. 



D. QUADRiMACULATA Say. (Serropalpus)=D. americana\De]. Arkansaw and 

 Missouri ; — Say : New York to Georgia, rare. 



D. SERICEA ila/c?. Slender, minutely punctured, sericeous; brown, paler beneath, 

 with a reddish tinge : antennae, palpi, and feet, pale rufous ; front convex, minutely 

 punctured, thickly clothed with short hair ; eyes black ; margin of the clypeus and 

 of the labrum rufous : pronotum subquadrate, the sides sub-parallel, with the anterior 

 angles rounded, a dilated impression posteriorly towards the exterior angles : scutel 

 minute : elytra four times the length of the prothorax, and gradually tapering from 

 the base. 6 1. long. Pennsylvania. 



SERROPALPUS Hellenius. 



S. suBSTRiATUs HaM. Pale fuscous, somewhat sericeous : eyes, labrum, and 

 mandibles black, front convex, finely punctate-, and sparsely hairy : pronotum convex, 

 scarcely transverse, minutely and densely punctured, and clothed with short prostrate 

 hairs ; sides sub-convex, and slightly expanded from the basal angles to a little beyond 

 the middle, forming a slight prominence whence they contract forward to the head ; 

 posterior angles depressed ; middle of the disk with an anterior and posterior obsolete 

 dilated impression upon each side ; exterior margin forming a straight sharp 

 descending edge from the base to beyond the middle : scutel transverse, punctured, 

 apex truncate : elytra minutely punctate-scabrous, the punctures being arranged 

 mostly in transverse series, and having about nine rather indistinct strise ; feet long 

 slender. 5 1. long 1 1. wide. Northeast boundary of Maine. J. C. Brevoort. This 

 and the following species seem not to belong strictly to this genus, the labial palpi 

 being very small. 



S. OBSOLETUS "Ha/d/. Dark brown, dull sericeous, finely punctate, prothorax simple, 

 sides regularly convex : elytra punctate and obsoletely striate. 4 § 1. long. Lake 

 Superior and Oregon. Closely allied to the preceding, but distinguished by the 

 regularly convex sides of the prothorax, and the scarcely striate elytra. 



