New Species of S. African Tabanidae (Dipt era). 529 



Abdomen black with very narrow lighter posterior borders. Winy* 

 with brown veins. 



GEN. SILVIUS, Meig. 



The two new species of Silvius described below were sent me for 

 identification by Dr. L. Peringuey, Director of the South African 

 Museum, Cape Town. 



SILVIUS CALLOSUS, d , ? , n. sp. 



Type (male) from Durban, Natal (Bell Marley). 



Type (female) from Kar-Kloof (Bell Marley), and another female 

 from Durban, in Cape Museum Coll. 



A robust species of dull brown colour with some obscure yellow 

 markings, distinguished by the lineal frontal callus. Length 12 mm. 

 male, 12-15 mm. female. 



Male. Face dull brown with some grey tomentum. Palpi brown 

 with black hairs. Antennae light reddish-yellow, the first two joints 

 brown with black hairs. Eyes bare, the upper facets larger than the 

 lower ones. Thorax brownish, with no distinct stripes ; pubescence on 

 dorsum scanty, light in colour. Scutellum same colour. Abdomen 

 with rather a mottled appearance, the yellowish colour predominating 

 on the basal half, of an Isabella colour ; on the underside this colour 

 extends over the whole abdomen ; the segmentations above and below 

 are very narrowly white-haired. Leys dull reddish brown. Wings 

 clear, with yellow veins. This male is not in good condition. 



Female has dusky brown rather large palpi as long as the proboscis 

 with dark pubescence. Antennae as in male. Forehead about one- 

 fourth in width of the length, not narrowed at either end ; the callus 

 is almost lineal, dark brown extending to the ocelli. Thorax 

 mahogany brown with short white pubescence. Scutellum rather 

 paler in colour. Abdomen raw umber, with paler markings, the 

 segmentations with narrow fringes of short white hairs ; underside 

 much the same colour ; the first segment on dorsuui with a pale baud 

 on its posterior border. 



SILVIUS HIRSUTUS, c , 9, n. sp. 



Type (male) from Matroosberg, Ceres Division, Cape, 3500 ft. 

 Type (female) and another male in Cape Museum Coll. 

 A dark blackish brown species with hairy eyes and thorax, and 

 abdomen with hairs, rather near Silvius decipiens, Loew, but at once 



