170 DESCRIPTIONS OF NEW SPECIES. 



3d joint of kind tarsi two-thirds longer than wide, prothorax rounded 

 at the sides and slightly roughened. 2. agrestis (Kirby). 



3d joint of hind tarsi half longer than wide, prothorax angulated at 

 the sides, and strongly roughened. 3. asperatus Lee. 



B. 3d joint of hind tarsi bilobed, cleft nearly to the base, the 4th joint 



received into the emargination, not extending as far as the end of 

 the lobes ; elytra less finely punctured, (sides of prothorax rounded, 

 scarcely asperated): 

 Prothorax deeply impressed, hind tarsi with 3d joint nearly twice longer 



than wide. 4. montanus, n. sp. 



Prothorax feebly impressed, hind tarsi with 3d joint very little longer 

 than wide ; 

 Prothorax very finely punctured. 5. obsoletus (Rand.). 



Prothorax less finely punctured. 6. nubilus Lee. 



C. Eyes smaller, less prominent, and more deeply emarginate than in the 



other species, prothorax and elytra finely punctured, the former 

 rounded, not asperated, feebly impressed at the middle ; 3d joint of 

 hind tarsi 7. australis Lee. 



4S3. C. iuontanus. 



This species is founded on four specimens from Colorado, 

 having very much the appearance of C. productus, but differ- 

 ing by the 3d joint of hind tarsi cleft nearly to the base, and 

 by the less finely punctured elytra. The prothorax is scarcely 

 wider than long, rounded on the sides, with only a few elevated 

 points, finely and densely punctured, with the two discoidal im- 

 pressions, the medial channel, and two tranverse impressions 

 deep. The hind tarsi are slender, the 2d joint is more than twice 

 as long as its width, and the 3d is about half longer than its 

 width, cleft nearly to the base. The antenna? of the % are about 

 three-quarters as long, those of the 9 , one-half as long as the 

 body. The ventral sexual characters are as in the other species, 

 the 5th segment being broad in the % , elongate in the 9 ; in 

 the % the 6th segment is visible. Length 19-24 mm. 



7. G. australis Lee, Pr. Ac. Nat. Sci., Phil. 1S62, 43 ; Asemum 

 australe Lee, Journ. Ac. Nat. Sci. Phila., 2d ser., ii. 35. I have 

 seen only the type of this species, which on account of the finer 

 punctuation, and general appearance, I placed in Asemum from 

 which it differs by the eyes being larger, more coarsely granulated, 

 and not hairy. 



