Mr. F. P. Pascoe on new Neotropical Curculionidce. 493 



The pectoral canal extending to the metasternum or beyond 

 is the character of a small group of Cryptorhynchinse forming 

 Lacordaire's u sous-tribu Sophrorhinides." In this new genus 

 the absence of ocular lobes and the short broad elytra differen- 

 tiate it from Mecistocerus ; in Melranta, another genus with- 

 out ocular lobes, the pectoral canal is prolonged to the basal 

 segment of the abdomen. The sides of the elytra bounding 

 the scutellum, sloping inwards or depressed, will, I think, 

 often afford a valuable generic character. 



Thrasyomus tumens. 



T. niger, subnitidus, setulis griseis adspersus ; rostro basi carinato ; 

 elytris rude punctatis ad latera baud ampliatis. Long 51 lin. 



Hob. Chontales. 



Black, somewhat glossy, with scattered grey setulose 

 scales, more crowded in the punctures ; rostrum smooth, 

 pitchy, an elevated line at the base ; head and prothorax 

 granulate-punctate, the latter transverse, much narrower an- 

 teriorly, a smooth elevated line in the middle ; scutellum 

 oblong, pointed behind ; elytra somewhat triangular, very 

 convex, shoulders prominent, apex rounded, striate-punctate, 

 the interstices scarcely raised, punctures coarse and quadrate ; 

 body beneath sparingly punctured, each abdominal segment 

 having only a single row ; tibia? fluted, the inner edge straight ; 

 tarsi rather short, equal, the third joint broadly bilobed. 



Thrasyomus angulatus. 



T. niger, setulis griseis adspersus, lateribus protboracis condensatis ; 

 rostro haud carinato ; elytris subgranulato-punctatis, ad latera 

 subito deflexis. Long. 4^ lin. 



Hah. Nauta. 



Dull black, with scattered greyish scales, which are more 

 numerous on the sides of the prothorax ; rostrum smooth, 

 pitchy, without an elevated line at the base ; antenna? ferru- 

 ginous ; prothorax as in the preceding, but less granulate, and 

 the elevated line confined to the apex; scutellum shortly 

 oval ; elytra trigonate, the sides abruptly deflexed and marked 

 off from the back by a sharply-defined angle, seriate-punctate, 

 the punctures coarse and bounded behind on each side by a 

 small glossy granule ; body beneath irregularly punctured ; 

 legs as in the preceding species. 



This species is at once distinguished by the sharply angular 

 or carinated sides of the elytra and their peculiar sculpture. 

 Both species have a slightly marked ridge on the front between 

 the eyes. 



