240 Mr. E. E. Austen on a new 



darker from near base to just bejond antemedial ; outer line 

 ontcurved, irregular. Hind wings: discal spot large ; outer 

 line outcurved ; the termen of botli wings rather more heavily 

 scaled. Underneath whiter, the lines duller. 



Expanse 27 mm. 



Hub. Tuis. 



[To be continued.] 



XXX. — A new Species of Tabanus from German East 

 Africa J in the British Museum {Natural History). By 

 Ernest E. Austen. 



(Published by permission of the Trustees of the Britisli Museum.) 



Tabanus trianguliger, sp. n. 



$ . — Length (22 specimens) 13*6 to 16 mm. ; width of 

 licad 5 to 5"6 mm. ; width of front at vertex 0"8 to 1 mm.; 

 length of wing 12 to 13*4 mm. 



Dusky species (^dorsal surface of abdomen in rubbed speci- 

 mens more or less cinnamon-rufous), with upper surface of 

 body bearing conspicuous, light-grey markings ; front mode- 

 rately broad and of uniform width ; dorsum of thorax 

 longitudinally striped loitli grey ; dormm of abdomen bearing 

 three longitudinal series of large, smoke-grey or drab grey 

 triangles, so that the ground-colour is reduced to a minimum ; 

 wings faintly tinged ivith drab, almost hyaline; femora pale 

 {greyish fawn-coloured or greyish ochraceous buff), inner 

 surfaces affront pair more or less dark broivn. 



Head : subcallus pale cream-coloured pollinose ; face, 

 jowls, and basioccipital region whitish pollinose and clothed 

 with white hair; occiput light grey pollinose ; front smoke- 

 grey, clothed with short, yellowish hair, but with a darker, 

 black-haired patch on vertex, and a similar patch in the 

 middle ; front (estimated by eye) about four times as long 

 as its breadth at lower extremity, inner margins of eyes 

 bordering it parallel or only very slightly convergent below ; 

 frontal callus rather large, dark "brown, not very shining, 

 roughly quadrate in shape but with its angles (at least the 

 upper pair) rounded off ; traces of a second, similarly 

 coloured, elongate (more or less elliptical) callus are usually 

 distinguishable in the centre of the median dark patch ; 

 proximal joint of palpi greyish cream-buff, clotiicd with 



