Namaquaropus niger gen nov. & sp.nov. is described from South Africa. In addition, two new species of the subgenus Jehania Distant of Isometopus Fieber (I. mirus sp.nov. and I. maculipennis sp. nov.), and Paloniella flavicolor sp.nov. are described. With these, the known species of Isometopinae in South Africa now number sixteen.