62 



SOME HLOOD-SUCKING ANP OTHEU nil'TERA FROM TFIE ANGLO-EGYPTIAN SUDAN 



Tin's spccii's tlius shows a striking sexual dim()r]iliism in the inarkinf^s of the l>odv. A 

 curious iilpcrriitidn is, however, |iresenteil \>\ two t'riiiales in tlie Muscuin ciillectiim, t'nmi liie 

 ]iahr-El-(}hazul, Fehruiiry, lOOf) {.\/oj„r //. //. /',/,/,.„, />.S.(>.),&ud tli, llawa-li Valley, 

 Abyssinia, 1901 (A. A". I'fiixe), respectively, whieh actually have their abdomens spotted as in 

 the male, though the spots in tlie ease of the Abyssinian specimen are somewhat more 

 triangular in shajx' ; in addition, these two females also sliow traces of a patcli or streak of 

 yellowish hair in tJic median line on the second and fifth abdominal segments. Judging by the 

 number of specimens of the two forms received up to the present time, in the Anglo-Egyptian 

 Sudan feniaks with jjule hair on head and thorax would appear to be more etimnion than 

 those with goldeii-yeilow hair on these |)arts. The same variation is seen in females from 

 Uganda, and u female from Natal (Umfiili River) in tlie Museum collection also has the 

 hair on luail and thorax distinctly palti- than in otiier females from the same colonv. 



As already mentioned, 'ruhinni." /liiiulttifii.i was met with in the Bahr-El-(ihazal in 

 February of last year by Major U. 11, IVnton, who also found the species at Kodok in 190U ; 

 other specimens were taken by Major (i. Dansey Browning, R.A.JI.C, on November 6th and 

 7th, 1905, on a steamer on thr White Nile near Kodok, and at Molub. Additional examples 

 from the White Nile have been forwarded to the Museum by JIajor H. N. Dunn, R.A.M.C. ; 

 Captain S. S. Flower, Superinteudent of the Zoological (iardens, Cairo (March 20th, 1900, 

 " from about lat. 11.0° N.") ; and the late Captain H. E. Haymes, R.A.M.C. (" on boat on 

 Nile, 30 miles south of the Sobat River)." 



The range of '/'. hiijuttufiis extends from Cape Colony to the Aiiglo-Egvptian Sudan and 

 Abyssinia ; the species also occurs further to the east in the Peninsula of Aden. In West 

 Africa (Northern Territories of the Gold Coast and Northern Nigeria) there exists a form 

 with pale iialjii. wliirji is possibly t'lititled to subspecific rank. 



Tabanus 

 fascuilus 

 niloticus 



7',i/,iii,iit<j'ii.sciafiiK, Fabr., subsp. ui/o/lnis — subspecies nova 

 (Plate VI.) 



?. — Length 15 to 17 mm. ; wing-expanse 32J to 33i mm. 



Head find thorax ochraceoua-hiijf a/iofi'^ liiiff hi'low, J rout soiiietimen ochno'i-oim ; 

 ahdomen (hi drii'd xpi'cimt'riK) pah' mnizi' yidhnr^ xomi'what tiiiruy towards the tip, and on 

 banal half iisuntti/ ii-ith a .iinjiiesfiou of (/reeii ; abdomen in life probablii larf/elii, if tint 

 eiitirelif, apple ifreeii ; iriiii/s with costal border n.t fur ns end of stii/ma, and a transversa lunid 

 acrosH middle, brown. 



//(■'/(/ clothed beneath witii golden-yeliuw iiair ; frontal callus of same colour as ground- 

 colour, in width eciual t(j aliout half tile front ; aiiteiiiue yellow mottled with green, tips 

 tawny; palpi rather slemler, pale yellow and clotiuil witli pale goideii-yelluw hair, sometimes 

 with a few minute black hairs towards the tips. 



Thora.r clothed above with short black hair, pleura' with longer pale yellowish hair. 



Abdomen clothed above with minute golden hairs, towards hind margin of third segment 

 and on median area of f(dlowing segments with minute black hairs. 



Legs: femora and middle and hind tibia* yellow or greenish-yellow; front tibia' dark- 

 brown, swollen, yi-llowish towards base above, and on lighter area clotheil with short close- 

 lying golden hair, elsewhere clothed with black hair; front tarsi black, middle ami hind 

 tarsi reddish-brown, lighter towards base; hiutl tibije fringed on outside with golden hair, 

 inside clothed with shorter hair, yellowish on basal, black on distal half. 



fl'iin/s: transverse band darker brown than costal margin, eijual in width to length 



