Hypermallus Casey (not Lacordaire), 1912, Mem. Coleopt. vol. 3, p. 292.

Form elongate, slender to moderately robust, subcylindrical to moderately depressed. Head narrowly channeled between antennal bases; maxillary and labial palpi short, not very unequal, last segment slightly expanded; antennae moderately heavy, outer segments more or less flattened, often convex or carinate, third segment armed at inner apex with a moderate spine, those of following segments, if present, becoming successively shorter, outer angle of segments mute or armed with a small spine. Pronotum subcylindrical or rounded at the sides, usually with dorsal tubercles or calluses; prosternum with intercosal process arcuately declivous behind; episternum of metathorax narrow, nearly paralle-sided. Elytra with apices usually emarginate, usually bispinose. Legs slender; femora without apical spines.