OF AMERICA NOKTH OF MEXICO. 167 



The thorax is rounded and convex, not at all armed : the body is covered with 

 long erect hairs. The appearance is that of Parmena, from which it differs by 

 having the antennse not fringed beneath, but with only a few long hairs at the 

 extremity of each joint. The angle of the anterior acetabula is very distinct, while 

 in Parmena it is almost closed. The inflexed margin of the elytra is very wide (as 

 in Monikma) while in Parmena it is quite narrow. 



1. T. FASCiATus, nigro-piceus valde pilosus, thorace grosse punctato, punctis 4 albo-pubescentibus transversiin 

 positis, eljtris parce punctatia fascia angusta subbasali, alteraque pone medium angulatis albo-pubescenti- 

 bus. Long. -2 — -3. 

 Mas, tborace elytris latiore, globose, capite exserto pone oculos constricto. 



San Diego, California ; June. The posterior band of the elytra is either narrow or 

 wide. The male in its exserted head shows a character not met with in any other 

 insect of this division. 



MONILEMA Say. 



Mandibulae apice emarginatae. 



Femora valde clavata. 



Antennae articulis a 3'° gradatim brevioribus, non pilosae. 



Epistoma corneum. 



Acetabula antica rotundata. 



Palpi maxillares articulo ultimo obconico. 



This is a Dorcadiou form with the thorax either mutic or armed, with a very 

 minute spine. The elytra are ample, and extend far down upon the sides of the 

 abdomen ; the antennse are annulated with cinereous. This genus differs from all 

 others I have seen by its corneous epistoma. I have corrected Say's spelling of the 

 name. 



1. M. ANNULATUM, nigrum, thorace punctis paucis impresso, basi punctis marginato, lateribus pone medium 



obsolete spinoso, eljtris fere aequaliter convexis, longitudinaliter rugosis, versus basin grosse parce 

 punctatis, versus latera postice subtiliter cinereo-pubescentibus. Long. -58 — -8. 

 Say. J.Ac. Nat. Sc. 3, 403. 



Near the Rocky Mountains. Guerin de Meneville, (Icon. Regne An.) expresses 

 the opinion that this genus may be allied to Prionaptera, but there is nothing in 

 Say's description to warrant that inference. This species seems to feed on Opuntia. 

 The rugae of the elytra are sometimes obsolete. 



Newman's description of Collapteryx is so poor, that it is hard to understand. His 

 species may possibly enter this genus. 



2. M. SEMiPUNCTATUM, nigrum, thorace grosse punctato, spatio transverse ad medium fere laevi, lateribus 



acute breviter spinoso, elytris ante medium parce punctatis, dorso convexis, lateribus subito declivibus. 

 Long. 1-OS. 

 One specimen, Vallecitas, California. 



