The genus Microphontes Londt, 1994 (Diptera: Asilidae: Brachyrhopalinae) is revised. Currently, three species are known from Namibia and western South Africa, i.e. Microphontesmegoura Londt, 1994 from north-western South Africa, Microphontessafra Londt, 1994 from Namibia and Microphonteswhittingtoni Londt, 1994 from western South Africa. Four new species, Microphontesericfisherisp. n. from the Little Karoo of South Africa, Microphontesgaiophanessp. n. from the Namib desert of Namibia and Microphontesjasonlondtisp. n. and Microphonteskryphiossp. n. from western South Africa, are described. Distribution, occurrence in biodiversity hotspots sensu Conservation International and seasonal incidence are discussed. Descriptions/redescriptions, photographs and identification keys are provided and made openly accessible in data repositories to support future studies of the included taxa. An unusual flight pattern of male Microphontesgaiophanessp. n. is discussed. A unique morphological feature on tergite 8 of Microphontes females, termed postero-paramedian T8 pores, is described, illustrated and discussed. Keywords: Assassin fly, robber fly, cybertaxonomy, open-access, male flight behaviour, female postero-paramedian T8 pores.