Elongate, black, pubescence fine, sparse, prostriate, subsquamiform and collected in spots on the elytra. Beak densely punctured, substrate at base, frontal puncture distinct, head punctured. Prothorax not wider than long, sides parallel behind, rounded and obliquely narrowed before the middle, scarcely constricted at tip, densely and coarsely punctured, with a very narrow, smooth dorsal line. Elytra but little wider than the prothorax, rounded just behind the humeri, then nearly parallel on the sides; striae composed of large approximate quadrate punctures, interspaces narrow, punctured. Thighs armed with a small tooth; middle and hind tibiae feebly serrate, obtusely bidentate near the tip. Body beneath coarsely punctured, sparsely clothed with pale brown scale-like hairs.

Length 5.0-6.5 mm.; 0.20-0.25 inch.

California, Nevada, and Colorado. In the specimens I have seen, the funicle of the antennae is less slender than in the two preceding species; the club is oval-acuminate, small, and feebly annulated. The legs are much less coarsely punctured than in the other two species.