Description: Elongate-oblong, small to large-sized, ranging from about 8–21 mm in length. Integument generally dark brown or ferrugineous with whitish, ferrugineous, brown, and ochraceous pubescence. Head with frons subquadrate to elongate, about as wide as width of two to 3 1/2 lower eye lobes. Eyes with lower lobes ovate-oblong. Genae subquadrate to elongate, variable in size, from distinctly shorter to distinctly taller than lower eye lobes. Antennal tubercles prominent, widely separated; tubercles armed at apex with a small projection (females), or with a short to moderately long, blunt or acute horn (some males), or with a large, blunt process (some males); antennae about as long as overall body length (females), or as much as twice as long (some males); scape clavate, shorter than antennomere IV; antennomere III curved or sinuate, longer than scape and antennomere IV; antennomere XI shorter than X (females) or longer than X (males). Pronotum transverse, roughly cylindrical to conical, wider at base, with or without lateral tubercles. Elytra with sides roughly parallel to slightly attenuate; elytral apices individually rounded; elytra generally uniform in coloration or speckled, or with distinct maculae; base of elytra with two prominent tubercles at humeri. Basal 1/3 of elytra with moderate to dense punctation, surface finely punctate, coarsely punctate or granulate-punctate. Procoxae without projection (females) or with an obtuse tubercle (males). Mesosternal process with apex feebly to deeply emarginate. Metafemora moderate to short in length, about 1/3–1/4 as long as elytra.
The combination of the following characters will help to distinguish this genus: widely separated antennal tubercles, armed at apex in both sexes; strongly transverse pronotum, roughly cylindrical to slightly conical; base of elytra with two prominent tubercles at humeri; and elytra with sides roughly parallel to slightly attenuate.
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