NORTH OF MEXICO. 



335 



with striee of punctures, with flat interstices finely and very sparsely punctured. The un- 

 der surface of the body is smoother and more sinning. 



Length .80-.96 inch. 



The typo specimens were from Colorado, others have since been found along the Sier- 

 ras of California. 



Lewi si i, Horn. 



In this form the whole surface is still more shining than in the preceding two. The 

 stria 1 of the elytra are scarcely interrupted, the interstices convex, impuncturcd and finely 

 transversely wrinkled. 



Length .80-.96 inch. 



Collected rather abundantly by Dr. Lewis, in the region of the Raton Mountains of 

 eastern New Mexico. 



COELOCTTEMIS, Mann. 



Coelocnemis, Mann., Bull. Musi:. 1848, p. 280. 



The nientum is here broader than long, supported on a short, rather broad gular pe- 

 duncle, rounded on the sides, slightly emarginate in front and with the margins not in- 

 flexed. The sculpture of its surface varies. The tibia 1 of the male are apparently slightly 

 thickened in their lower half, somewhat flattened on the inner face, with line of fine pu- 

 bescence on each edge extending half way up, so that the tibia appears grooved on the 

 inner face. The intercoxal process of the abdomen is very broad and truncate at tip. The 

 first joint of the hind tarsi equals the second and third together, and, very nearly equals 

 the last joint. The tibial spurs are here very short. The elytra are connate and the 

 body is apterous. 



The species of this genus resemble Eleodes very closely in form, but may be at once 

 known by the tarsal vestiture and by the elytra feebly embracing the abdomen. The un- 

 der surface of the head of all the species is very rugose, by the confluence of rather deep 

 coarse punctures. All are shining, black. They arc found rather abundantly in Califor- 

 nia, Oregon and Nevada, under stones or fallen bark, and are rarely found walking in 

 daylight, except when the day is dark and cloudy. They may then be found feeding on 

 growing plants, principally Saxifragese. 



Our four species may be distinguished as follows : 



Thorax broader than long; strongly rounded or sub-angulatc at the sides. 

 Elytra broader behind the middle, suddenly declivous behind; thorax 

 narrower at base than long, always sub-angulatc on the sides, 

 which are rounded anteriorly, sinuate posteriorly. dilaticollis 



