64 



SOME BLOOn-BrCKINO AND OTHER DirTF.RA KllOM THE ANOLO-EOYPTIAN SUDAN 



Fig. 28. Tabanus afkicanus. Gray. ? ( x 2). .After .Austen 



Natal to the White Nile 



Tawny ochr.-u:fon.s : lejjs black : winj; m.irkinKS brown. 



/»> ki»it ^fiitission of Trusti-fs n/ Hrilish Musnim. 



$, $. — $ (2 siK'cimi'Us), Ifiigtli 17 I til 18^. mm. 



$ (SI spi'ciiiu'iis), U'ngfh Ki^ to 17 mm. ; wing-expanse not exceeding 36 mm. 

 Tiitrmi ocllliicfoiis ; ti piitc/l i>J hriUidiitly ir/ilfr lunr iit Imsf of iriinj on rilc/i aide, iiinl 

 anolhiT mill liinji'r /iiitr/i ii lilllr Miiiiil litis, /u'linr jniKlrrior iDiiilf of //lorii.r ; li'i/s Iddrk, frinit 

 lihiiv sirollfii, eitpeciaUii in ^; wingn willi liiisi>, tiro trinixrrrsf /iinu/s^ mul roa/nl /larihr us fur 

 ii:i uftjier liiinirh of third vein, or (dmosi to ti/i, In-oini. 



//"Ill Diiinge-ochract'oiis, ilotlicii witli similarly coloured hair; antennie and last joint of 

 palpi (except Itasc of latter) lilackisli ; third joint of antennie long and narrow, Imt little 

 cxpamlcil at liasc. 



Tliora.r entirely without markings ; 

 in $ clothed with orangc-ochraceous hair, 

 ill '} with short Mack liair above, and 

 longer orange-ochraccous hair on sides 

 and lielow. 



Hull, rrs : Iciiul) yellowish - white, 

 stalk lirnwiiisli. 



Aliiliniiru clothed above 



with short ochraceons- 

 rufous hair, in the case of the ? inter- 

 spersed with black hairs in median area 

 towards tip ; sides of fourth to seventh 

 segments inclusive marked with a squarish black patch, clothed with black hair ; posterior 

 angles of these segments clothed with silvery-white hair ; eighth segment entirely black : 

 ventral surface — a black patch on sides of third to sixth segments inclusive in f and third to 

 lifth inclusive in $ ; last two segments in $ and last three in $ mainly black ; hind margins 

 of third to sixth segments in $ and third to seventh in ? whitish. 



Lefin: hind tibia; fringed with black liair mi inside ami outside. 



W'iiiijs: first transverse band terminates on fifth vein and runs across proximal half of 

 both basal cells, learimi n rh'iir spot at tlu'ir nfrrmi' l>ii.fi>.<! ; second transverse band runs across 

 middle of wing, is e»]ual in width to length of discal cell, reaches hind margin at tip of fourth 

 posterior cell, and dies away in fifth posterior cell ; discal cell often entirely brown, but some- 

 times witli a more or less conspicuous longitudinal (dear streak; anal cell generally more or 

 less tinged with browii, especially at tip ; alula brownish ; browni costal border dies awav 

 for some little distance beyond second transverse band, but broadens again above extreme 

 tip of wing, the tips of second longitudinal and of ujiper braiuh of third vein being often 

 conspicuously suflFused witli bniwii. 



^. I/i'iiil : eyes with upper three-fourths, except hind margin, composed of much 

 larger facets than those below; terminal joint of palpi cylindrical, pointed ami clothed with 

 black hair at tip, ochraceous at base ; penultimate joint orange-ochraceous. 



?. //.'/./. front broad, widening below and relatively short, its height equal to about 

 two and a half times its width at the angles of the eyes; transverse callosity at angles of 

 eves brown, oblong, extending right across front and touching eye on each side; no trace of 

 any other tubercle or line on front ; terminal joint of palpi slender, under side of base 

 orange-ochraceous and clothed with similarly coloured hair, elsewhere clothed with minute, 

 black hairs. 



Li'ijs : front tiliia' iriuidi thicker tiian in T, anterior margin very convex. 



