Two species of Diaphlebia Selys from Central America are placed on record, one of which ismew and herein described under the specific name pallidistylus, the other conspecific with Selys’ paucinervis. On account of the characters found in these species a proposal to subdivide the genus Diaphlebia into three subgeneric groups Diaphlebia s. str., Desmogomphus Williamson, and Perigomphus subgen. nov, is made.