188 DESCRIPTIONS OP NEW SPECIES. 



not sulcate nor carinated, 3d joint a little longer than the 4th, the 

 latter and following ones nearly equal, llth very feebly appendi- 

 culate. Prothorax rounded on the sides, constricted at the basal 

 margin, without dorsal callosities. Elytra parallel, rounded at 

 tip. Front coxal cavities round, not at all angulated externally ; 

 open behind, prosternum very narrow between the coxae ; middle 

 coxae rather widely separated, scarcely angulated externally, meso- 

 sternum subtriangular, emarginate behind; metathorax emargi- 

 nate behind, episterna narrow, scent pores not distinct ; ventral 

 segments equal, 1st a little longer, 5th rounded at tip, 6th not 

 visible. Legs stout, thighs compressed, gradually tolerably 

 strongly clavate, tibia? not carinate, spurs moderate, first joint of 

 hind tarsi as long as the two following. 



The body is covered with fine short brown pubescence, with 

 long erect hairs intermixed. 



501. Z. obscurus. Supra piceo-niger, opacus, dense subtiliter fusco- 

 pubescens, pilis erectis intermixtis, prothorace latitudine hand longiore, 

 lateribus rotuudatis, punctulato et hand profunde grosse punctate ; ely- 

 tris antice fortiter punctatis, punctis postice sensim subtilioribus ; subtus 

 piceus, subtiliter punctulatus, pubescens et pilosus, prosterno vage 

 punctate. Long. 13 mm. 



One specimen ; Pennsylvania. Of the same form and size as 

 Tylonotus bimaculatus, but quite distinct by the antennas not 

 being sulcate, the prothorax without callosities, and the piceous 

 legs. The general appearance is that of a Callidium. 



It is quite possible that this genus is not distinct from Zamium 

 Pascoe. It agrees in all particulars with the detailed description 

 given by Lacordaire, 1. c. viii. 215, but does not possess the 

 group characters of Saphanides, in which Zamium is placed by 

 my learned and lamented friend. The second joint of the anten- 

 nae is quite small in the present genus, which would prevent its 

 association with Saphanus, Opsimus, etc. 



COMPSA PEKTY emend. LAC. 



502. C. puncticollis. Elongata, picea, pube brevi cinereapruinosa. 

 prothorace latitudimfcTuplo longiore, lateribus paulo rotundatis, confer- 

 tim punctato, opaco ; elytris nitidis, punctulatis punctisque majoribus 

 raris intermixtis, scutello dense cinereo-pubescente. Long. 8 13 mm. 



Cape San Lucas, Lower California, Mr. Xantus. The 3d 

 and following joints of the antennae are finely carinate, and the 



