On th? Boittlii/l!!,! Fn it mi <>f Mouth Afrira (Di/>teraY 1'27 



9 (10). Abdomen with white, non-shining scales and provided at the end with 

 alternating- white and black tufts . . vitripennis, Lw. 



10 (10. Abdomen witli transverse bands of glittering silvery scales, and at the 



end entirely clothed with such scales . argenttna, sp. n. 



11 (2). Wings darkened at the base and along the costal cell; legs yellow; 



species of great size ..... lasia, Wied. 



12 (1). Wings with a well-defined dark pattern, which fills up entirely the 



two basal cells ; face white-haired ; legs yellow leucocliila, nom. nov. 



VILLA FLAVIPES, Loew (1860). 



A species of middle size with entirely hyaline wings, distinguished 

 by the briefly haired abdomen and by the yellow femora. Female 

 originally described from Caffraria, and not recorded subsequently. 

 There is a male from Klipfontein, JSTamaqualand (Cape) (L. Pt'rin- 

 guey). The hitherto undescribed male is like the female, but the 

 frons at the vertex is only as broad as the ocellar tubercle ; the eyes 

 have the upper areolets a little enlarged ; the wings have a broad 

 silvery patagium and the basal comb is clothed with silvery scales. 



VILLA ALBESCENS, Loew (1860). 



Closely allied to the preceding, but at once distinguished by the 

 black femora and by the long-haired abdomen. 



Originally described from South Africa, but widely spread over the 

 Ethiopian region. A male from Hex River (Cape), another male from 

 Klipfontein, Namaqualand (Cape) (L. Periuguey). 



VILLA SEXFASCIATA, Wiedemaun (1821). 



Allied to the preceding, but distinct owing to the small tufts of 

 black hairs at the end of the abdomen and by the black legs, which, 

 however, are densely clothed \vith yellow scales. 



Described from South Africa and redescribed &s flavescens\yy Loew ; 

 it is also widely spread. In the collection there is a female from Hex 

 River (Cape), December, 1884 (L. Peringuey). 



VILLA VITRIPENNIS, Loew (1860). 

 Dipteren-Fauna Sikl-Afrikas, p. 217, pi. ii, fig. 18. 



Distinguished from all the preceding species by the large tufts of 

 black scales on the middle segments of the abdomen, and by the 

 vitreous wings, which have a blackish base and black veins. Described 



