162 Rev. H. S. Gorham's descriptions of 



simply thickened at the base, the joints of the antennje 

 gradually shortened, and acuminate internally to the tenth, 

 the apical one twice as long and compressed, a little falci- 

 form, all the joints laxly articulate. 



Colyphus marginatus, n. sp. 



Niger, capite thoraceque nitidis, hoc lateribus, illo epis- 

 tomate flavis, elytris subopacis crebre fortius punctatis, 

 fumeis, vitta submarginali flava. 



Long. 3 4 lin. 



Head very shining, impunctate, tips of mandibles black, 

 palpi touched with dusky ; thorax quadrate, strongly con- 

 stricted in front, base margined, the entire sides widely 

 yellow, disk depressed, shining, very obsoletely punctured. 

 Elytra dull smoky-black, closely and confluently punc- 

 tured, a yellow vitta of even Avidth runs from the shoulder 

 to the apex, leaving the margin narrowly dark ; the suture 

 is very narrowly yellow in the middle. Legs black, tro- 

 chanters yellow. 



Hab. — Mexico ; in my own collection (Saunders). 



Colyphus Jlanimeus, n. sp. 



Niger, capite thoraceque nitidis, hoc lateribus et infra, 

 illo epistomate testaceis ; elytris aurantiacis, apice late 

 margine reflexo, et regione scutellari nigris. 



Long. 3 1 lin. 



Of the size and form of C. marginatus; antennse 

 black, joints 6 — 10 triangular, about equal in length, 

 acuminate internally, apical compressed, acuminate. 

 Thorax quadrate, deeply impressed with a constricted 

 line in front, between which and the base the sides are 

 tumid and rounded. Elytra subopaque, thickly and finely 

 punctured, with the exception of a third at the apex, a 

 scutellar patch, and the limb narrowly; they are of a rich 

 orange-yellow, paler internally. 



Hab. — Mexico. In my own collection ( Saunders). 



Obs. — Both this and marginatus might be referred to 

 Chevrolat's genus Derestenus, which appears to me to 

 differ only in having the antennte subserrate, without any 

 distinct club. 



TJianasimus pallipes, n. sp. 



Nigro-piceus, nitidus, antennarum basi, palpis, pedibus, 

 elytrorumque maculis quatuor magnis pallidis ; elytris 



