newSjjecieso/T-iihsim. 327 



brown, shiiiiug, barely reaching the eyes, long, with a short 

 stout line proceeding from it; the vertex (? denuded) reddish 

 brown, a few black liairs on the sides ; the forehead narrows 

 anteriorly a little and is about five times as long as it is 

 broad ; back of head whitish, witli white hairs. Thorax 

 reddish, with five grey indistinct and four black stripes ; the 

 grey stripes are com] osed of grey tomenluin, the median one 

 is narrow, witli a broader one on each side and side-stripes; 

 the two middle black stripes only reacli the suture; these 

 black stripes only appear as stripes contrasted with the 

 reddish ground-colour of the thorax, which is not apparent 

 in the specimen from Lake Tanganyika, the thorax being 

 blackisl), with the five grey stripes apparent, which may 

 probably prove a more correct description of this species when 

 a long series is available for comparison ; pubescence on 

 dorsum black, on the grey stripes whitish yellow, sides with 

 black hairs, and with white hairs near the root of wings ; 

 breast and sides reddish, with grey tomentum and white 

 liairs. Scutellum reddish, with black pubescence and 

 yellowish hairs round the margin. Abdomen reddish, darker 

 at apex, with three distinct, grey, tomentose triangular spots 

 on tlie second, third, fourth, and fifth segments ; tliere are 

 traces of them on the sixth; the seventh is wholly black; 

 the median spots are roughly equilateral triangles with broad 

 bases resting on the posterior border of each segment and 

 each apex reaching the base of the succeeding spot, all almost 

 equal in size, except the one en the sixth segment, which is 

 smaller; the side spots are isosceles right-angled triangles 

 with the side nearest the median spots and the base, wiiich 

 rests on the posterior border of segment, straight, both 

 together forming a right angle ; the pubescence of dorsum 

 black, on the grey sjiots yellowish or white; sides of abdo- 

 men with white hairs, at the apex some black hairs ; underside 

 pale yellowish red, with grey tomentum and jaibescence. 

 Legs yellowish red, the apices of fore coxoj and the fore 

 femora reddish brown, the fore tarsi and the npiees of fore 

 tibijie blackish, the other tarsi brownish ; the coxa^ with long- 

 while pubescence, the fore and middle femora with black 

 pubescence above and some white below ; the posterior femora 

 with wholly white pubescence, the fore tibia3 with whitish 

 Jiairs on the yellowish base, the other tibia3 with chiefly 

 whitish pubescence, elsewhere it is black. Wings clear; 

 veiiis brown ; stigma yelh/wish brown, the first posterior cell 

 distinctly narrower at opening ; no appendix. 



The specimen from Lake Tangat)yika is browner in colour. 



