119 



25th, 1906 (E. L. Rhoades) ; Chikala District, March 29th, and 

 Zomba, April, 1906 (Dr. J. E. S. Old). East Africa Protectorate : 

 Mbuyuni, 1897 (C. S. Betton) ; Warkoi, 30 miles from the mouth 

 of the R. Juba, March, 1905 (Major L. H. R. Pope-Hennessy, D.8.O.) ; 

 Malka Sala, Dawa River, December 15th, 1908 (Dr. R. E. Drake- 

 Brockman). West Somaliland : Odhun and Gebidi labba dehd, 

 River Webi, November 26th and 27th, 1908 (Dr. R. E. Drake- 

 Brockman). Anglo-Egyptian Sudan : Bahr-El-Ghazal, February, 

 1905 (Lieut-Colonel R. H. Penton, D.8.O., R.A.M.C.}. Angola: 

 exact locality unknown, 1873 (J. J. Monteiro). Northern Nigeria: 

 Hadeija, March 8th and 28th, and Katagum, August 19th, 1907 

 (Dr. J. M. Dalziel) ; R. Benue, between Amara and Ibi, 1908 

 (Dr. J. McF. Pollard). Gold Coast : Accra, November 6th, 1907 

 (Dr. W. M. Graham, W.A.M.8.). A specimen of T. ditceniatus, 

 Macq., was " caught in a European house placed on high ground 

 at the mouth of the Gambia River," during the Expedition of the 

 Liverpool School of Tropical Medicine to Senegambia, 1902-1903.* 



It is stated by Surcouf and Roubaud| that in the region of Lake 

 Chad Tabanus ditcsniatus is known to the natives as Ter Abbiot 

 (white-headed Tabanus). Dr. J. E. S. Old, in an official report on 

 blood-sucking flies met with by him in the Chikala District, Nyasa- 

 land Protectorate, in March, 1906, writes of Tabanus ditceniatus : 

 " Some were seen on the plastering of the outside walls of the huts of 

 Chibwano's village, and biting men underneath Ficus trees." 

 According to Major L. H. R. Pope-Hennessy (in lift., March 19th, 

 1905), the Somalis near Kismayu, Jubaland, East Africa Protector- 

 ate, call this species " Baal ad" or " Baal at," but it would appear 

 that the name is applied indiscriminately to any small Tabanid.J 



* Of. Newstead, Button and Todd, Annals of Tropical Medicine and Parasitology, 

 Series T.M., Vol. L, No. L, p. 44 (February 1, 1907), where the species is called 

 Atylotua nigromctculatus, Bic. 



t Bulletin du Museum National d'Histoire Naturelle, Anne"e 1908, No. 5 (Paris, 

 1908). 



$ Vide supra, pp. 63 and 117, and also Austen, " A Monograph of the Tsetse- 

 flies" (1907), p. 307 and note. Dr. R. E. Drake-Brockman writes that T. ditceniatus 

 is "well known to the Somalis by the name of 'Bal ad,' and is considered by them 

 to be dangerous to stock, camels in particular suffering greatly from their onslaughts. 

 Although human beings are frequently attacked by these flies, no ill-effects seem 

 to accrue." 



