New species of Caenis (Ephemeroptera: Caenidae) from southern South Africa

Four new species of the genus Caenis Stephens 1835 are described: Caenis subota n.sp., Caenis helenae n.sp., Caenis parisi n.sp. and Caenis octulusa n.sp. Previously known species found in this area are Caenis basuto and Caenis capensis (known from South Africa only), Caenis brevipes and Caenis jinjana (both widely distributed in tropical Africa; new for South Africa). A redescription of C. basuto and C. capensis is given. Most records are from the border region between the West and East Cape in the Tsitsikamma region, only a few kilometres from the sea; some others from an area south of Lesotho at the West end of the Drakensberg.