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Robust, color black to brownish, dull. Head closely and distinctly, but not coarsely, punctuated. Clypeus is large and conspicuous, gula with a beard of dense pale hairs. Femora not clavate, abdoment with sternites very finely, closely punctured and densely clothed in a fine pubescence. Antennae reaching apical 1/3 of elytra with outer segments abruptly abbreviated, last 4 segments at most as long as 2 preceding segments together; pronotum very distinctly wider than long; angulated at sides; posterior tarsi with third segment cleft to middle. Apex distinctly emarginated. Females are slightly more robust than males, antennae reaching basal ¼ of elytra; fifth abdominal sternite as long as broad, apex rounded, length 17-31mm, males, 17-29mm (Linsley 1962). Overall, A. asperatus is most defined by the sharply abbreviated last 4 antennal segments, distinct asperites on the pronotum, and angular shape of the pits on the pronotum (Linsley 1962).