326 Miss G. Ricavdo on 



segment tiian<.ular, witli a very sliort apex barely reacliiii;^ 

 Jialf tlie width of the- segment ; the third spot with a slightly 

 longer apex ; the fourth spot on the fifth segment sub- 

 triangular, nearly reaching the posterior border of the next 

 segment ; on the sixth and seventh segments there are no 

 spots ; the side spots are four in number on each side, almost 

 similar in shape to those of Tabanus distinctus^ but not so 

 well defined, more irregular in shape; underside reddish, with 

 white-haired segmentations. Legs reddish, the extreme apex 

 of the fore coxse and extreme apex of fore femora^ the apices of 

 the fore tibiae, and the tarsi blackish ; the coxse with long 

 white pubescence ; the fore femora with short black pubes- 

 cence above and long white below ; on the outer border of the 

 other femora it is also white but not so long ; the fore tibiae 

 with thick white pubescence on their basal half, giving them 

 a whitish appearance; the other tibige with chiefly white 

 pubescence, on the tarsi it is black. Wings clear, yellowish 

 on fore border ; stigma yellowish ; veins brown ; the first 

 posterior cell slightly narrowed at opening. 



Tabanus distinctus, ? , sp. n. 



The following specimens are in the British Museum 

 collection : — 



Type (female) from Benguella, Angola {A. T. Massey, 

 per Ool. Giles), and another female from Lake Tanganyika 

 (W. A. Cunnington), 1906. 76. 



A medium-sized species with light reddish-brown abdomen 

 very distinctly marked with three series of grey triangular 

 spots and thorax with fairly distinct grey stripes. It is 

 distinguished from Tabanus congoiensis, sp. n., by the quite 

 clear wings and shape of side spots of abdomen, which are 

 isosceles triangles with their bases resting on the posterior 

 borders of segments. 



Length 15| mm. 



Head wider than the thorax. Face reddish yellow, covered 

 with greyish-white tomentum and with short thick white 

 pubescence on the cheeks and lower part of face ; beard 

 white, long. Palpi pale yellow, with yellowish-white 

 pubescence and tiaces of a few black hairs, stout at base, 

 slightly curvec', ending in a long point. Antennju red ; the 

 first joint very slightly cap-shaped, with black hairs on the 

 upper angle and some white hairs on its outer border ; the 

 second very small, with black pubescence; the third dull 

 red, with obtuse tooth, black at the extreme apex. Forehead 

 covered with grey tumentum ; the frontal callus reddish 



