AMERICAN COLEOPTERA. 135 



C. antennatns White = eurystethns Lee. 



This is easily kuown by the spinous antennae and the uniform pubes- 

 cence of the thorax. The elytra are obliquely truncate at tip, the outer 

 angle prolonged in a slender spine, the markings of the surface are a 

 modification of that of the other species in which the W-shaped band 

 and the second behind it are preserved, the others are either feebly 

 indicated or entirely wanting. The under surface is densely clothed 

 like the thorax. The prosternum is broader than long and slightly 

 prolonged at tip meeting the mesosternum but not overlapping it. The 

 third joint of the posterior tarsi is densely pubescent beneath. 

 This species occurs in Arizona, and lives in Mesquit wood. 



C crinicoriiis Chev. — Black, antenna3 and feet rufous. Head with 

 yellowish pubescence on the front and line at the occiput, front obtusely 

 carinate. Thorax broader than long, sides arcuate and gradually broader 

 behind, suddenly narrowed at base, the hind angles very distinct, surface 

 black with narrow yellow lines, the first at apex, two at middle, one basal 

 and a short line on each side at the hind angles which join the basal. Elytra 

 gradually attenuate behind, tip obliquely truncate, the outer angle very acute, 

 surface black with yellow transverse bands very much as in robinice which are 

 broken forming small spots. Body beneath pubescent at sides only, abdomen 

 sparsely punctured and glabrous at middle. Prosternum prolonged and dilated 

 behind the coxae, broadly emarginate at tip, meeting and slightly overlapping 

 the mesosternum which is abruptly vertical in front. Length .48 — .84 inch. 



This species reproduces exactly the markings of C. erjjthropus Chev., 

 but differs in the form of the prosternum. In the latter species the 

 prosternum is truncate at the posterior margin of the coxae and not at 

 all prolonged. It may however be synonymous with one of the other 

 species described from Mexico, or with dijficilis Chev., from Cuba, but 

 no mention is made of the remarkable character above named except 

 by Lacordaire, (Genera vol. ix, p. 62, note), who observed it in C.proxi- 

 mus L. et G. from Chili, with which ours is not likely to be identical. 

 Supposing it new I had given it a name calling attention to this 

 character, but its identity was made known to me by Mr. Salle. 



Occurs in California (southeast), Sonora, Arizona, Texas, Louisiana 

 and Nassau N. P. 



C. erytkrop^is Chev., is not yet known to me as an inhabitant of our 

 fauna. It has the thorax suddenly constricted as in crinicornis but 

 the prosternum is as in pictus. 



C pictus Drury. 



The prosternum is longer than wide, truncate at tip and not pro- 

 longed. The second joint of hind tarsus glabrous at middle. The 

 elytra are obliquely truncate at tip but not prolonged. The antennae 



