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The above arrangement of genera is copied from the " Classifi- 

 cation." 



GENTRODERA LeConte. 

 Prothoracic tubercle acute. 



Elytra unicolorous, truncate at tip decolorata. 



Elytra irregularljr vittate and blotched; rounded, and slightly dehiscent at 



tip picta. 



Prothoracic tubercle obtuse 



Elytral pubescence arranged in lines sublineata. 



Elytra uniformly pubescent nevadica. 



C. decolorata Harris, Injur. Ins. 1S41, p. 93; Lee, J. A. P. ser. 2, i p. 325; 

 riibida, Hald., Trans. Am. Phil, x, p. 58; Proc. Ac. Phil, iv, p. 373. 

 Length 27 j^ mm. ^ i.io inch. Habitat. — N. Y., Mich., Can., Mass. 



Eyes very prominent; antennae about as long as the body; pro- 

 thorax constricted and much narrower before the tubercle than be- 

 hind, channelled longitudinally on the disc; elytra at base nearly 

 twice as wide as thorax, slightly narrower posteriorly, coarsely punc- 

 tured, confluently near base and more finely towards tip. The insect 

 is entirely rufotestaceous, very sparsely pubescent. 



C. picta Hald., Trans. Am. Phil, x, 1S47, p. 58. 



Length 13 mm. ^ .52 inch. Habitat. — N. Y., Pa., S. C. 



Easily known by the smaller size and elytral coloring, which is 

 not caused by pubescence, but lies in the elytra. The antennae are 

 extremely slender, the thorax elongate, scarcely narrower in front 

 than behind, and the elytra are decidedly narrowed towards tip and 

 slightly sinuate behind the humeri. The pubescence is nearly as 

 sparse as in the preceding. 



C. snblineata Lee, Proc. Ac. Phil., 1S62, p. 40. 

 Length 14 mm. == .56 inch. Habitat. — N. C, Pa. 



The pubescence is more abundant, and so arranged on the elytra, 

 which are very faintly costate, as to give the appearance of lines. 

 Prothora.K with tubercle not prominent, somewhat obtuse, narrower 

 in front and bearing a sharply-defined, median channel. Antennae 

 longer than the body S , less slender than in preceding. Color dark 

 piceous. 



C. nevadica Lee, S. M. C. No. 264, p. 205. 

 Length 17 mm. = .68 inch. Habitat. — Nev. 



" By the obtuse tubercles of the prothorax this species resem- 

 bles C. sub/i?ieata, but the punctuation is finer, the prothorax is 

 scarcely narrower at tip than at base, and there is no appearance of 

 lines on the elytra." (Lee.) Color, fusco-testaceous. 



