DESCRIPTIONS OP NEW SPECIES. 45 



gin, and the fifth feebly impressed and emarginate behind. The 

 anterior thighs are feebly sinuate beneath, but not toothed. 



Several small species in my collection are yet nondescript, but 

 the want of time prevents me from making them known in the 

 present publication. 



CRYPTOBIUM MANN. 



156. C. piiiK'i'iaiiuiii. Nigro-piceum, nitidum, capite confertim 

 fortiter punctato, thorace angustiore, latitudine longiore parce fortiter 

 punctate, vitta lata dorsali laevi, elytris thorace longioribus, fortiter dense 

 punctatis, margine apicali rufescente, abdomine piceo punctato, seg- 

 mentis postice late rufo-marginatis, ventre pedibusque rufo-piceis. Long. 

 39. 



Valley of Colorado and Gila, California. The head is wider 

 and more thickly punctured than in C. bicolor, and the elytra 

 less coarsely but more densely punctured. In the male the 2d 

 and 3d ventral segments are deeply foveate at the middle ; the 

 3d is prolonged behind into a large obtuse process extending 

 over the 4th segment. 



157. C. sellat mil. Nigrum nitidum, capite confertim punctato, antice 

 laevi, thorace latitudine fere sesqui lougiore, parce subseriatim punctato, 

 vitta lata dorsali laevi, elytris dense punctatis, thorace longioribus, laete 

 rufis, vitta suturali comuiuni a basi ad dodrantena extensa, abdomine 

 puuctulato ; ore antennisque obscure, pedibus laete testaceis. Long. -35. 



Illinois, rare. The sixth ventral segment of the male is acutely 

 emarginate behind. A very beautiful and distinct species. 



158. C. despectum. Valde elongatum, nigrum subnitidum, capite 

 confertim subtilius punctato, fronte laevi, thorace latitudine longiore, 

 nitido, minus subtiliter sat crebre punctato, vitta dorsali Isevi angusta, 

 elytris dense punctatis, limbo apicali tenui testaceo, abdomine parce vix 

 conspicue punctulato, antennis palpisque obscure rufis, pedibus flavis. 

 Long. -26. 



Louisiana; Dr. Schaum. In the male the third ventral seg- 

 ment is prolonged into a broad rounded process extending to the 

 middle of the fifth joint, and clothed with very long divergent 

 hairs. 



159. C. pusillum. Valde elongatum lineare, nigrum, capite tho- 

 racique rude sat dense punctatis, hoc vitta dorsali angusta laevi, elytris 

 fortiter punctatis, thorace subbrevioribus, abdomine subtiliter haud dense 

 punctato, ore, antennis palpis pedibusque flavo-testaceis. Long. -20. 



