There are two species of Casiphia from Vietnam, the males of the genus with reduced elytra and they are one of very interesting prioninae of Vietnamese fauna. Casiphia vietnamica found from Tam Dao National Park while Casiphia takukawai found from Pu Mat National Park, Nghe An Provincee. Not like almost of other Prionid beeltes, species of genus Casiphia can be collected by catching during the day, not light trap.
Except the elytra of the males, antenna of males also very special shape with combed form. While male of species Casiphia vietnamica is black or red black, the species Casiphia takakuwai has two forms, black form and yellow (orange) forms.
Casiphia takakuwai male have elytra shape clearly difference from it of Casiphia vietnamica. In C. takakuwai there is a spine at apical lateral side of elytra but in C. vietnamica, there is no spine in the same position and the elytra somehow look shorter.
Casiphia vietnamica, female (above) and male (below)