Under the operation of this principle, the 

 present species is the C. viduus, Dejean. 



The upper figure of the plate. 



SPH^RODERUS. 



GENERIC CHARACTER. 



Head narrower than the thorax; external 

 maxillary and labial palpi, with the last joint 

 dilated, securiform, compressed; labrum elon- 

 gated, profoundly emarginate ; labium very 

 large, profoundly emarginate, not wider at base 

 than at tip; mandibles elongated, narrow, bi- 

 dentate near the tip; the thorax rounded, not 

 elevated on the sides, nor extended behind; 

 abdomen robust, convex ; elytra entire, not 

 divided at the suture, carinate each side, em- 

 bracing the sides of the abdomen; tarsi with 

 the three basal joints, in the male, dilated. 



PLATE 45. 



