Genera and Species o/Tabanidio. 31 



scutes (invisible from above) buff, narrowing from base oE 

 alxlomen to distal extremity, and clothed witii white or 

 yelhnvisli-white hair; posterior angles of fourth, fifth, and 

 sixth segments clothed with yellowish hair; ventral surface 

 greyish cream-buff, clothed with appressed yellowish or 

 whitish hair (seventh segment mouse-grey, clothed with 

 black hair), hind borders of third to fifth segments inclusive 

 cream-coloured poliinose. Wings: veins dark brown or 

 mummy-brown ; stigma elongate, somewhat darker than 

 costal cells, the latter together with the stigma constituting 

 an abbreviated coloured border, which forms a couspicuous 

 contrast with the colourless remainder of the wing. Squamos 

 light drab. Halteres : knobs cream-buff, somewhat darker 

 at base ; stalks ochraceous-buff. Legs : coxae grey, clothed 

 with white hair ; femora and tibiffi cinnamon, femora clothed 

 with white hair and more or less grey at base^ under surfaces 

 and distal extremities of front tibiae dark brown or brownish ; 

 front tarsi not expanded, clove-brown (first joint dark 

 brown) ; last two joints and tips of first three joints of 

 middle and hind tarsi dark brown, remainder of middle and 

 hind tarsi cinnamon. 



Portuguese East Africa : Umbelusi River, 20 miles south 

 of Lorenzo ^Marques, December 1910 (C. JF. Howard). 



The awl-liKe sha])e and relatively great length of the 

 third joint of the anteunaj give this species an altogether 

 unusual appearance, and will alone suffice to prevent 

 confusion with any other African Tabanus at present 

 known. 



Tabanus minuscularius, sp. n. 



? . — Length (2 specimens) 8'G to 10 mm,; width of 

 head 3 to 3*6 mm. ; width of front at vertex 0*75 mm. ; 

 length of wing 7"2 to 82 mm. 



Small, dusky species, with conspicuously grey -striped thorax, 

 and dorsum of abdomen marked with an ill- defined^ yellowish- 

 grey, median, longitudinal stripe, and, midway betiveen this 

 and lateral margin on each side, a sharply defined and some- 

 times broader strijte of lighter grey, more or less distinctly 

 composed of a series of elongate spots. 



Head: front yellowish - grey poliinose, parallel-sided, 

 relatively rather broad (its length about two and one-half 

 times its breadth), subcallus cream buff poliinose, ground - 

 coloitr of subcallus ochraceous-buff; face, jowls, and basi- 

 occipital region whitish grey, clothed with white liair ; 

 occij)ut grey, posterior orbits \e\low'iA\ ^vey ; fi'ontal callus 



