188 DESCRIPTIONS OF NEW SPECIES. 



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

 latter and following ones nearly equal, 11th 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, presternum very narrow between the coxse ; middle 

 coxae rather widely separated, scarcely angulated externally, rneso- 

 sternura 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, tibiae 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, protborace latitudine baud longiore, 

 lateribus rotundatis, puuctulato et baud profunde grosse punctato ; ely- 

 tris antice fortiter punctatis, purictis postice sensiru subtilioribus ; subtus 

 piceus, subtiliter punctulatus, pubescens et pilosus, prosterno vage 

 puuctato. Long. 13 mm. 



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

 Ti/lonotus bimaculatas, but quite distinct by the antennae 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 Perty emend. Lac. 



50*2. C piincticollis. Elongata, picea, pube brevi cinereapruinosa. 

 protborace latitudine duplo longiore, lateribus paulo rotundatis, confer- 

 tim punctato, opaco : elytris nitidis, punctulatis punctisque ruajoribus 

 raris intermixtis, scntello 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 



