A new genus of Prionoglarididae from a Namibian cave (Insecta: Psocoptera). - Sensitibilla strinatii gen. n., sp. n. is described and illustrated based on three females and several nymphs collected in Arnhem Cave (124 km SE of Windhoek). The new genus is closely related to the North American genus Speleketor Gurney. The description of its type species, Speleketor flocki Gurney, is complemented and the systematic position of both genera within the family Prionoglarididae is discussed. The presence of trichobothria on legs, unique in Psocoptera, is considered as a striking synapomorphy of Speleketor and Sensitibilla. Keywords: Psocoptera, Prionoglarididae, new genus, new species, trichobothria, cave fauna, Namibia.