Conotrachelus integer n. sp. - Oblong-oval, moderately convex above, dull, black, the elytra and legs with a feeble piceous tinge; pubescence of the elytra not very dense, consisting of short recumbent hairs, ochreous or fulvous in color, nearly evenly distributed and scarcely at all mottled, mixed with short sparse setae, not paler or denser behind the middle, the pronotum sparsely setose. Head densely and rather finely punctate, the yellowish pubescence not extending beyond the front ; beak long, slender, arcuate, about one-half as long as the elytra in the male, strongly sulcate, the antennas inserted beyond apical third. Prothorax very nearly as long as wide, the sides broadly rounded anteriorly, becoming parallel and nearly straight in basal three-fifths, finely, moderately constricted just behind the apex, the latter not more than one-half as wide as the base; disk coarsely, extremely densely, unevenly and subconfluently punctate, evenly convex and with a fine entire median carina. Elytra one-half wider than the prothorax and not quite three times as long, two-fifths longer than wide, the sides becoming subparallel in basal half; humeri right, widely exposed but rounded; disk with series of moderately large deep close-set punctures, the alternate intervals with fine strongly-marked entire carinae. Abdomen coarsely, very deeply and densely punctate. Legs long; femora moderately robust, subfusiform, obtusely and very feebly uni-dentate, the toothed appearance caused principally by the abrupt and deep subapical emargination; tarsal claws divergent, strongly toothed. Length 6.0 mm.; width 2.9 mm.
The single male represents a species allied to naso, but with the pubescence of the elytra much sparser and not at all condensed or whiter behind the middle, and the pronotal sculpture more than twice as coarse, being fully as coarse as in geminatus. Both this species and carinifer have the peculiar oblong-oval form and general rostral structure of naso, and should evidently be associated with it.