The species of the African genus Stomylus Fahraeus (Coleoptera: Tenebrionidae: Diaperinae)

The species of the tenebrionid genus Stomylus Fåhraeus, 1870 (type species Stomylus bicolor Fåhraeus, 1870) (syn. Pselaphidion Gebien, 1920) within the tribe Diaperini are revised. Seven species are recognized as valid, distributed exclusively in Africa south of the Sahara and lacking in Madagascar. The diagnostic characters are figured (also by Scanning Electron Microscope), new distributional data are given and an identification key is compiled. New synonyms: Stomylus apicatus (Gebien, 1910) = Stomylus trituberculatus (Pic, 1926) syn. nov.; Stomylus nigronitens Gebien, 1920 = Stomylus loebli Ardoin, 1980 syn. nov.; Stomylus schroederi (Gebien, 1904) = Stomylus schroederi ssp. bimaculatus Ardoin, 1969 syn. nov. New combination: Diaclina gracilis ( Fåhraeus, 1870) comb. nov. from Stomylus.