Odmalea Bergroth, 1914

The genus can be recognized by having the head wider across the eyes than long; the lateral margins of the head are sigmoid and tapering to apex; the mandibular plates are usually separate at apex; the first antennal segment not surpassing the apex of the head; the antennal segment I and II shorter than III to V; the labium reaching the metacoxae; the humeral angles are produced in a spine; the prosternum and metasternum are flat or nearly so; the mesosternum is weakly tumescent behind the procoxae; the opening of scent efferent system straight or slightly curved, and the abdominal ventral spine reaching the metacoxae or sometimes the mesocoxae (Rolston 1978c; Rolston & McDonald 1980).