Trichapion nigrum
(Herbst, 1797) 
Source: WTaxa, 2012.
Family: Brentidae
Black, usually distinctly pubescent. Head much as in the preceding [A. rostrum] except for the sculpture of rostrum. Antennae basal joint but little exceeding second, and combined with it not equalling one-third of the entire member. Thorax as in rostrum; elytra of the same general form, humeri smaller, proportionately rather longer; striae and intervals as in the preceding. Length 2-2.5 mm.
Hab. U. S., except Pacific States.
This species varies considerably in size, density of pubescence, form of rostrum, which is sometimes dilated and sometimes not; form of elytra, which are sometimes more ovate, and size of head, which is occasionally less transverse; in general appearance very similar to the preceding [A. rostrum]; it is at once distinguished by its smaller size, more evident pubescence and more elongate form. This is probably the species mentioned by Harris as feeding in the seeds of Locust, and specimens in Dr. Horn's collection are marked "On Locust, Adirondacks."
