Beak short, stout, curved, strongly punctured and striate, as in C. nenuphar. The prothorax is wider than long, constricted in front, rounded on the sides, strongly rugosely punctured, and very distinctly carinate from the tip nearly to the base; each side is a straight, oblique line of fuscous pubescence, united at the tip. Elytra with fuscous or grayish pubescence, more condensed into a transverse band behind the middle, alternate interspaces carinate; third interrupted in two places; fifth interrupted at the pubescent band; two outer carina3 rather indistinct; striae composed of large, distant quadrate punctures. Thighs not annulated, with one large, acute tooth, and one small denticle. Length 4.6 mm.; 0.18 inch.

Middle and Western States; Texas. Of the same form and size as C. nenuphar; it is distinguished from the next species chiefly by the broader, more strongly carinate prothorax; by the two lines of pubescence being straight, and meeting at the front margin; and by the first ventral segment being less punctured than the others. It is C. seniculus | Dej. Cat.