A new genus of the family Bagridae, Hemileiocassis, is distinguished from other genera in the following characters: dorsal spine with antrorse serrations, vomerine tooth band relatively small and crescentic, with molariform teeth, prominently protruding snout, 11 branched anal fin rays, and an elongate body (its depth 12.6% in standard length). Its sole species, H. panjang n.sp., is known only from the holotype from Bogor, Java.