330 Miss G. Rieardo on 



liairs; beard white. Palpi yellow; fairly stout at base, 

 tapering to a point; some black hairs visible. Forehead the 

 same colour as the lace j the subcallus with wrinkles and a 

 fine median black line. Frontal callus reddish brown, oblong, 

 not reaching the eyes, prolonged as a fine line ; on the vertex 

 a short reddish stripe, grey in the centre, is apparent; 

 tomentum on posterior half of the forehead yellowish. 

 Antermai blackish ; the first and second joints and base of 

 the third dark reddish brown. Thorax brown, shining, with 

 four grey stripes and a median lineal yellowish stripe ; the 

 sides greyish with grey hairs, with black hairs above, 

 reaching to the wings. Scutellum brown with some grey 

 tomentum. Abdomen dark reddish brown, short, with grey 

 tomentum; on the first segment is an imperfect triangular 

 grey spot in the centre ; on the second a median triangular 

 grey spot hardly reaching beyond half the width of the 

 segment ; on the third segment a similar spot with shorter 

 apex ; the three following segments with similar spots which 

 become smaller and more oblong in shape ; all the segmen- 

 tations after the third segment are whitish, becoming broader 

 at the sides ; the brown colour becomes darker round the 

 grey triangular spots ; the dorsum is devoid of pubescence ; 

 the sides are bordered with fine short white hairs ; the undn- 

 side brownish, with white segmentations and short white 

 pubescence. Legs reddish brown ; the fore legs darker with 

 the exception of the base of the tibiae, the pubescence greyish, 

 short. Wings hyaline; the veins and stigma dark brown, 

 the cross-veins at the apices of the basal cells have a slight 

 shading which is hardly perceptible in the upper cross-veins; 

 no posterior cells narrowed at their apices. 



Tahanus diversus, ? , sp. n. 



The following specimens are in the British Museum 

 collection : — 



Type (female) and another from Ruwe, Lualaba River, 

 Congo Free State, circa 11° S., 26° E., Feb. 1906 {Dr. A. 

 Yale Massei/), 1906. 98. 



This small black species, with the abdomen marked with 

 very distinct grey spots and thorax with grey stripes and 

 spots, clear wings, short antennse, and brown legs with 

 yellowit^h tibiae, is very nearly allied, to Tabanus insu/nis, 

 Loew, from E. Africa, but easily distinguished by its black, 

 not brown colour, by the absence of the four white spots on 

 the second segment of abdomen, by the different, more 

 oblong shape of the large spots on the third and fourth seg- 



