640 BOSTON JOURNAL 



isli : elytra black, with a very small rufous portion at base ; be- 

 fore the middle a deeply zigzag narrow cinereous band in the 

 form of a W, the middle angle pointing anteriorly, wider on the 

 lateral margin ', anterior to the band are large punctures in regu- 

 lar striae ; posterior band broader, cinereous, not undulated : post- 

 pectus with a black middle. 



Length one-fifth of an inch. 



May be distinguished from nigrifrons S. and nigrvpes S. by 

 the intermediate angle of the anterior band pointing forward, 

 and from dubius F., which it closely resembles, by its blackish 

 head, middle of postpectus, and by the form of the posterior 

 band, which is not undulated as in that species. It was sent to 

 me for examination by Dr. Harris. 



[Belongs to Thanasimus, and afterwards described as ahdomi- 

 nalis Kirby, which name being preoccupied was changed by Klug 

 to nubilus, without recognizing the identity with Say's species. — 

 Leg.] [164] 



5. C. HUMERALis S. Joum. Acad. Nat. Sc. vol. 3, pt. 1, 

 1823. 



C. humeralis Germar, Sp. Novae. 1824. 



TRICHODES Fab. 



1. T. NUTTALLI Kirby, Trans. Linn. Soc. vol. 12. 

 T. apivorus Germar, Sp. Novae, p. 81. 



It has also received a name in Dejean's Catalogue. 



2. T. VERTICALIS. — Blackish; head yellow, with a black vitta; 

 feet and base of the elytra yellowish. 



Inhabits United States. 



Blackish, somewhat bronzed : head yellowish, with a black 

 vitta on the vertex : thorax somewhat cylindric, a little larger in 

 the middle : elytra shorter than the abdomen, not meeting at the 

 suture, a little narrowed to the tip, which is rounded, densely 

 and irregularly punctured, punctures rather large ; a large, yel- 

 lowish spot extends from the base nearly to the middle : feet 

 yellowish. 



Length three-twentieths of an inch. 



Var. a. tenellus. Thorax dusky : elytra entirely pale yellowish 

 white, at tip only a little dusky. 



[Vol. I. 



