African Flddioiomic Diptera. 279 



appressed, yellowish hairs, its coloration similar to that of 

 dorsum, but first two and distal portion of third and fourth 

 segments, as well as sides of fourth segment^ somewhat more 

 infuscated. Wings : in discal cell of right wing of typical 

 specimen proximal transverse light mark is connected with a 

 light spot of some size in proximal extremity of cell, which 

 is absent in left wing. 



Hcematopota gracilis is not closely allied to any of its 

 African congeners at present knoAvn to me : apart from the 

 wing-markings, the shape and coloration of the antennae and 

 frontal callus, the coloration of the legs, and the non-incras- 

 sate front tibiae will at once serve to distinguish it from 

 H. Incessens, Austen, a smaller and darker species which also 

 Qccurs in Northern Nigeria. 



Hcematopota coronata, Austen. 



(Ann. & Mag. Nat. Hist. ser. 8, vol. ii. July 1908, 

 p. 100. — Somaliland.) 



c? . — Length (1 specimen) 10'6 mm.; width of head 

 3*6 mm. ; length of wing 8*2 mm, 



Sepia-coluu7'ed, tvith smoke-grey or drab-grey markings / 

 apart from secondary sexual characters, agreeing in all essen- 

 tial respects ivith ? / spots on dorsum of fifth and sidth 

 abdominal segments sonieivhat more elongate. 



Head : frontal triangle with an elongate clove-brown 

 median mark, extending from base of antennae half-way 

 towards junction of eyes, with a small, shining, dark mummy- 

 brown spot on each side of its upper extremity ; an ill-defined 

 brownish area on each side of base of antennae ; palpi coloured 

 as in 2 , terminal joint clothed with fine yellowish hairs, 

 cylindrical-ovate, distal extremity somewhat elongate ; an- 

 ienme (especially first joint, which is somewhat more incras- 

 sate) shorter than in $ . 



Haithalhim, near Aden, Arabia, 20. iii. 1895 [Lt.-Col. 

 Yerbury). 



The occurrence of this Somaliland species in the Arabian 

 portion of the East-African Sub-Region of the Ethiopian 

 Kegion is, of course, in no way surprising, since other and 

 better-known African Diptera, such as Tabanus bigiittatus, 

 VVied., and a tsetse-fiy {Glossina tachinoides, Westw.) are 

 found on the eastern shore of the Strait of Bab-el-Mandeb. 



Hiematopota tenuis, sp. n. 



$ . — Length (2 specimens) 8'2 to 8*4 mm. ; width of head 

 (2 specimens] 2'4 mm. ; width of front at vertex (2 speci- 



