Up to the present time but a single species is known in the genus Diploplectron Fox, the type D. (Liris) brunneipes Cresson. Recently, in arranging a large collection of Hymenoptera, presented to the United States National Museum by Professor Carl F. Bader, three additional species were recognized, which are described below.
Ashmead, William H., "Three New Species in the Genus Diploplectron Fox (Hymenoptera)" (1899). An. Paper 73.