List of South African Tabanidae (Diptera). 451 



veins, yellowish on fore border ; veins reddish, a short appendix 

 present. In the second females, the thorax has five distinct fulvous 

 narrow stripes, hardly noticeable in the type. 



CORIZONEURA DISSIMILIS, 11. Sp. 



Type (female) and two other females from Cape Colony (Van 

 Wyk's Ylei, E. G. Alston, 1890). 



A species nearly allied to Corizoneura albifacies n. sp. but at 

 once distinguished by the blackish legs and absence of a whitish 

 band on the third segment, the forehead is not so broad, and the 

 long white hairs on face are absent. Length of type, 13 mm., 

 others 10^ mm. 



Face blackish, covered with greyish tomentum, with a few short 

 silvery white hairs, intermingled with darker ones, becoming 

 numerous on the cheeks. Beard white, scanty. Palpi black, the 

 first joint longer than the second, which is small, swollen at base, 

 ending in a short point. Proboscis 2 mm. long, pointing outwards. 

 Antennae black, the first two joints with a few pale hairs. Forehead 

 same colour as the face, the same width throughout, barely 1 J mm . 

 wide, the pubescence on forehead short and white. Thorax black, 

 covered with short but dense white pubescence, which becomes 

 slightly fulvous posteriorly, sides with fulvous pubescence. Scutellum 

 same as thorax. Abdomen not so stout and convex as thorax in 

 Corizoneura albifacies n. sp., the colour not such a deep black, the 

 first segment almost wholly covered by the whitish tornentose band, 

 the second band not half as wide as the segment, the third segment 

 with no band, the fourth segment with a narrow band, the next 

 segment transparent yellow on its posterior border, and the last two 

 segments largely yellow, pubescence on dorsum black, not noticeable, 

 the bands with longer silvery white hairs ; underside reddish with 

 the grey bands reduced to a minimum, those on the second and 

 fourth segments discernible. Lens blackish, the tibiae and knees 

 dull reddish brown, pubescence on femora yellow, elsewhere black. 

 Wini/s hyaline, very faintly tinged yellow, veins yellow, appendix 

 present. 



GENUS EHINOMYZA, Wied. 



Nova Dipt. Gen. 8 (1820). 



EHINOMYZA COSTATA, Loew. 



Dipt. Slid Afrik. i. p. 26 (1860). 



Three males from Cape Colony (Hex River, Clanwilliarn, 

 Dunbrody) ; one female (O'Okiep, E. Warden). 



