Apion carinirostrum Fall, 1898: 148
Source: O'Brien C.W., Wibmer G.J. 1982. Annotated checklist of the weevils (Curculionidae sensu lato) of North America, Central America, and the West Indies (Coleoptera: Curculionoidea). Memoirs of the American Entomological Institute 34: 1–382.
Family: Brentidae
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Black, pubescence well marked beak (male) a little shorter than the head and prothorax, rather stout, feebly curved, scarcely dilated, somewhat shining and pubescent nearly to the tip; (female) longer than the head and prothorax, nearly glabrous; sides parallel; surface less shining. In both sexes the punctures are rather large and confluent in longitudinal lines ; the intervals more or less carinate. First antennal joint reaching the eye, as long as the three following (female), a little shorter (male). Front flat, narrower than the tip of the beak; eyes feebly convex, not at all prominent. Prothorax nearly as long as wide; base about one-fourth wider than the apex; apical constriction feeble; sides subparallel in basal half, with a slight posterior sinuation; surface moderately, strongly and closely punctate; an impressed line at the base. Elytra a little wider at the middle; humeri moderate; sides feebly arcuate in basal half, more strongly posteriorly; intervals rather wide, convex. Punctuation beneath moderate. Length 1.5-1.7 mm.; .06-.07 inch.

Male: Sutural tips rounded; middle and hind tibiae mucronate.

Female: Sutural tips not rounded; tibiae unarmed. 

A very distinct species and easily recognized by the canaliculate and carinate beak, the narrow front and feebly convex eyes.