<>n the Jt.Httbylitil Fmani of South Africa (Diptera). 139 



SUBGEN. METAPENTA. 



This group is an exclusively Ethiopian one, and the species it 

 includes are chiefly confined to the South ; in the present collection 

 there are two species. 



EXOPROSOPA (METAPENTA) PENTALA, Macquart (1840). 



Closely allied to reticulata, Loew, but distinct by the red scutellum 

 and the red legs. 



A female specimen from Dunbrody, Uitenhage (Cape) ; (J. A. 

 O'Neil), February, 1912. Macquart has described the female from the 

 Cape, but the figure of the wing is very misleading ; and the species 

 has nothing to do Avith the Mediterranean varinerius-pygmalia/n, Fabr., 

 which is the type of my new subgenus Mesoclis. 



The species is very like M. reticulata, but is paler ; the frons is 

 entirely black, but the face and the first antennal joint are red ; 

 thorax with the pleura mostly yellow haired, the metapleural tuft 

 with only a few black bristles ; scutellum red with black base. 

 Abdomen black, with the sides of the 2nd and 3rd segment more or 

 less broadly red, or even red with median black spots. Legs entirely 

 red, but tarsi darkened and femora partly black-scaled ; front tibae 

 thin and smooth. Wing pattern and venation as in reticulata. 



EXOPROSOPA (METAPENTA) CORVINA, Loew (1860). 



Near E. pentala, but distinguished by the quite black legs and 

 metapleural tuft, and by the almost entirely black wings. 



A female specimen from Damaraland, Grootfoutein, December, 1918 

 (E. M. Lightfoot) ; Otjivarongo. January, 1920 (R. W. E. Tucker). 



SUBGEN. ACRODISCA, nov. 



This subgenus is also an exclusively Ethiopian one, and the South 

 African species belong nearly all to one of the two groups in which 

 it is divided, viz. the group characterised by the very short or even 

 rudimentary antennal style, and by the shape of the discoidal cell at 

 end, which is almost equal to that noticeable in Litorrhynclms. 



The species in the collection may be distinguished as follows : 



1 (4). Wings uniformly infuscated, not broadly hyaline at the apex, never 



at the hind border. 



2 (3). Metapleural tuft wholly or for the greater part black ; antennal style 



rudimentary; species of smaller size . . fimbriatella, sp. nov. 



