African Phhlotomic Diptera. 363 



of front femora more or less grey ; tips of front tibire, es[)C- 

 cially on inside, where they are elothcd witli short, aj)pressed, 

 black hair, dark brown ; front tarsi clove-brown, not eon- 

 spicnonsly expanded, middle and liind tarsi dark brown, first 

 joints exfe[)t distal extremities brownish cinnamon-rufous. 



Nortliorn Xijroria: OtYa, 27. ix. 1910 {J.J. Simpson : pre- 

 sented l)y the I'^ntoniological Kesearch Committee). 



Although in general appearance Tahanus sinip.'ioni presents 

 a closer resemljlance to T. kingsleyi, liicardo (which belongs 

 to Sureoufs " Ninth Group'' of the genus Tabanus*), than 

 to any other of its congeners at present known, the affinities 

 of this handsome new species, with which tlie author has 

 much pleasure in connecting tlie name of its discoverer, are 

 in reality with Sureoufs " lughth (Jroup,'' which includes 

 Tabanus tcBniola, Pal. de Beauv , T. distincius, Ricardo, and 

 allied species. From all of these, however^ the new species 

 is distinguishable at once by its very conspicuous and 

 Bharply defined body-markings, as described above. From 

 7'. kiiir/sleyi, Ricardo, T. simpsoni can be distinguished by, 

 inter alia, the greater breadth of the front and of the median 

 stripe on tlie abdomen, by the inner margins of the eyes 

 bordering the front being parallel or practically so, instead 

 of converging below, by the sharper definition of the cream- 

 buff, admedian, thoracic stripes, by the terminal joint of the 

 palpi being cream-coloured and clothed with whitish or 

 yellowish-whitish hairs, instead of Isabella-coloured and 

 clothed mainly with black hairs, and by the pale legs and 

 more hyaline wings. 



Besides occurring in Northern Nigeiia, Tabanu.<i simpsoni 

 is also found in the Gold Coast Colony : since the above 

 description was drawn up, the National Collection has 

 received a second female of this species, caught in the 

 Hospital at Salaga, Northern Territories, Gold Coast, on 

 July 5, 1910 (taken and presented by Dr. F. J. A. Beringer, 

 W.A.M.S.). 



Tabanus besti, Sureouf, var. arbucklei, var. n. 



$. — Length (7 specimens) 14 to 18'2 mm.; width of 

 head 4'5 to 5*6 mm, ; width of front at vertex rather less- 

 thau 05 to 0*5 mm. ; length of wing 11 to 132 mm. 



Differing from the typical form of the species in the third 



joint of the antenme being narrower, and in the paler portion 



[rather more than the proximal half) of the front tibia being 



* Cf. J. M. R. Sureouf, 'Etude Monographique des Tabaaides 

 d'Afrique," p. 16 (1909).. 



