176 



Say^s Descriptions of new 



3, C. qmdridens. Thorax angulated, four toothed; 



head horned. 



Mex 



B 



with an elongated, recurved, trigonate horn, which is as 

 long as the thorax, punctured and acute : thorax rugose, 

 angulated ; posterior angles compressed, elevated, suba- 

 cute ; on a line between them are two remote, short, ver- 

 tical, conic denticulations ; anterior margin near the mid- 

 dle with two short, vertical, conic denticulations separated 

 by a raised line : elytra with obsolete striae. 



Length seven tenths of an inch. 



/ 



A fine species, not so brilliantly colored as the carni- 



as the triangularis y Nob., from both 



of which it is eminently distinguished by the thoracic den- 

 ticulations. 



4. C. procidua. Thorax three-homed; head two- 



horned. 



Inhabits Mexico. 



Bad]/ black: head punctured, two-horned; anterior 

 horn vertical or hardly recurved, not as long as the head ; 

 posterior bora very short, inclined : thorax punctured, with 

 three horns, the middle one very obtuse and emarginate, 

 lateral ones acute, in a transverse line on the anterior sub- 

 margin ; anterior margin declivous ; anterior angles round- • 

 ed ; an impressed, abbreviated dorsal line and a lateral in- 

 dented spot; posterior disk impunctured : c/yfra with im- 

 pressed, punctured striae ; interstitial spaces convex, im- 

 punctured. 



Var. a. Highly polished. 

 Length more than three fifths of an inch. 

 The armature of the thorax is very similar to that of 

 C lundrisy Linn., but it is less robust, and is widely dis- 



