PROC. ENTOMOL. SOC. WASH. 80(1), 1978, pp. 51-55 TWO NEW SPECIES OF PHLEBOSOTERA DUDA (DIPTERA: ASTEIIDAE) FROM NORTHERN NIGERIA J. C. Deeming Abstract. — Two new species of the genus Phlebosotera, P. sabroskyi and P. inuiva, are described from northern Nigeria. The genus Phlebosotera was erected by Duda (1927:125) to accommodate his new species mollis from Cyprus. Sabrosky (1956:234) modified the generic diagnosis and (1956:235) gave a key to the Old World species, wliich included four Palaearctic and two Ethiopian species. Frey (1958:48) de-scribed a further species from the Canaiy Islands. A further three species are known from the Nearctic (Sabrosky, 1943:511 and 1957:50-51) and one from the West Indies (Sabrosky, 1957:51). Two new species are here described from Nigeria. Both species, like the type-species, have the male postabdomen asymmetrical and the aedeagus very large, heavily sclerotized and of a complicated structure. Phlebosotera sabroskyi Deeming, new species (Fig. 1-6) Male. — Head yellow with all hairs and bristles yellow; frons rather brownish tinged, in profile (Fig. 2) hardly raised above eye, with slightly sunken, subshining but ill-defined greyish-white stripe extending foi^wards from internal vertical bristle almost to level of anterior ocellus and slightly raised area bearing ocelli matt black; facialia and jowls slightly infuscate, but ground color obscured by coarse whitish-grey dust; pair of minute in-fuscate poreHke spots present on face at slightly above Mj its height; occiput greyish dusted; eye with short pale hairs; antenna yellow with part of inner surface of 3rd segment brownish and arista black; palpus yellow with hairs of moderate length; proboscis brown. Thorax yellow, coarsely grey dusted dorsally, more weakly dusted laterally and ventrally; mesopleuron with long shining brownish-black mark along its lower border; postnotum brownish black; bristles and hairs of mesonotum and scutellum dark brown, single sternopleural bristle and fine hairs on mesopleuron and sterno-pleuron yellow; prosternum (Fig. 4) joined to mesosternmn and linked to widely-separated fore coxae by membranous bridge. Wing (Fig. 5) yel-lowish hyaline with yellow veins; haltere yellow. Legs yellow, weakly yel-lowish dusted and with yellow hairs. Abdomen yellow, basally appearing a little darker, weakly sclerotized and weakly yellowish dusted, tergites bearing short brown hairs; terminalia (Fig. 6). Length about 1.75 mm, of wing 1.90 mm.