Emended diagnosis of the genus Noctophus, stat. rest.

Body elongate, relatively slender; head short, subhexagonal with vertex not bulging posterodorsally and sharply demarcated from 'neck' region; tempora, genae and postgenae covered with thick bristles; labrum emarginate at middle; submentum lacking lateral sutures; hypostomal ridges extending from cardines posteromesally, not connected at middle and not reaching posterior tentorial pits; antennae gradually thickened; pronotum bell-shaped, broadest in front of middle, lateral margins slightly sinuate in posterior third; pronotum with five small antebasal pits, lacking sublateral and lateral carinae, sides covered with bristles; basisternal part of prosternum shorter than coxal part, densely setose; prosternum lacking prosternal process or carina; notosternal sutures and hypomeral ridges complete; mesoscutellum not visible between elytral bases in intact specimens; each elytron with two small asetose basal foveae; mesoventrite with a pair of anterior impressions functioning as procoxal rests, impressions are filled with setae, separated at middle, with their anterior margins well-defined but not demarcated posteriorly; mesoventral process narrowly carinate, weakly elevated, extending from anterior ridge to posterior margins of mesocoxae; metaventral intercoxal process short, subtriangular, with a narrow posteromesal notch, very narrowly separating metacoxae.