Revision of the genus Phaeochroops Candèze (Coleoptera: Scarabaeidae, Hybosorinae)

A revision of the species of Phaeochroops Candèze is given. The species recognized before this study are redescribed and seven new species are defined, viz., P. colopacilis (Vietnam), freenae (Malaya), seres (Vietnam), ninbin (Vietnam), lakhonicus (Thailand), longisetosus (India) and vulturius (Sumatra). For nine species lectotypes are designated, viz., P. gigas Arrow, punctulatus Arrow, indicus Arrow, opacicollis Arrow, rattus Arrow, batuensis Arrow, mentaweiensis Arrow, niasianus Arrow, vulpecula Arrow. Five forms are considered synonyms, viz., P. niasianus Arrow, batuensis Arrow and mentaweiensis Arrow are synonyms of rattus Arrow (P. mentaweiensis already synonymized by Arrow, 1942) ; recticollis Pic is a synonym of silphoides Fairmaire ; punctulatus Arrow is a synonym of gilleti Benderitter (synonymy presumed by Arrow, 1942). Plates of four new species are given, as well as figures of male genitalia, sculpture of dorsal surfaces, and setosity for nearly all species. A key to the species, a checklist, and notes on bionomics and distribution are given.