11 



French Ivory Coast and Southern Nigeria, while in Belgian Congo 

 (North Katanga), it was met with on one or two occasions by 

 Dr. Schwetz (132). 



Glossina tachinoides, Westw. (Plate I, Fig. 2). " One of the smallest 

 of the known Tsetse-flies. Dorsum of thorax olive-grey or smoke-grey, 

 with dark brown longitudinal markings of usual type, though often 

 indistinct ; ground colour of abdomen ochraceous-buff or buff, dorsum 

 with sharply denned clove-brown or dark brown markings .... 

 second segment with a very conspicuous, square or oblong, pale 

 (ochraceous-buff or buff) area in centre ; hind tarsi dark brown, i.e., 

 all the joints more or less dark, extreme tips of first three joints and 

 extreme bases of second and third joints buff, a larger or smaller area 

 at base of first joint also paler than remainder of joint, especially in $ " 

 (Austen). 



" G. tachinoides," writes Austen, " has a very wide range in West 

 Africa, where, as for instance in Northern Nigeria, it is often locally 

 abundant. Besides being found from Senegal to French Congo, the 

 species also occurs in the French Sudan (on the shores of Lake Chad 

 and the banks of the Bani and Shari rivers) [and likewise in Cameroon] ; 

 and, although not yet recorded from Belgian Congo or the Uganda or 

 East Africa Protectorates [Kenya Colony], its range evidently extends 

 right across Africa, since G. tachinoides .... has also been met 

 with in Southern Arabia (26) , thus being, so far as is known, the only 

 existing species of Glossina found outside the African continent and 

 certain of the islands off the coast. 



" As regards the French possessions in West Africa, G. tachinoides has 

 been identified by Professor Laveran from Casamance, Marigot de 

 Bayla, Bignona, and Carabane in Senegal ; the Lower Rio Nunez, 

 Boke, and the Tinkisso River in French Guinea ; the banks of the 

 Bani and Shari rivers in the French Sudan, and the Mayo-Kabbi 

 region in French Congo. 



" The species under consideration is evidently very widely distri- 

 buted along the rivers and streams of Northern Nigeria [Katagum and 

 Bornu Provinces]. 



" In Nigeria it was found a few years ago by Mr. G. C. Dudgeon that 

 the areas of occurrence of G. tachinoides appeared to alternate with those 

 of G. palpalis .... In Togoland, however, Dr. Zupitza met 

 with both species together on the Oti River (a large tributary of the 

 Volta) , although ' on the German bank of the Volta north of 8 Glossina 

 tachinoides was found and no palpalis.' In the Western Province of 

 Ashanti, in 1910, Dr. A. Kinghorn always found G. tachinoides together 

 with G. palpalis on the Tain and Black Volta rivers, the former species 

 being the commoner ; Dr. Kinghorn believes that both occur on the 

 Volta, ' from its mouth to the French border/ " (Austen). 



Glossina austeni, Newst. (syn. G. brandoni, Chubb, 1915). This 

 species, described since the appearance of Austen's " Handbook " and 

 placed by its author, Professor Robert Newstead, F.R.S., in the 

 Glossina morsitans Group owing to the characters exhibited by the 

 male genitalia, presents more external resemblance to G. palpalis and 

 its allies, with which it therefore seems better to associate it. 



Among the more noticeable characters of G. austeni are its small 

 size and somewhat attenuated shape, the relative narrowness of the 

 head, the presence of an interrupted, but more or less sharply marked, 

 black, longitudinal stripe on each side of the dorsum of the thorax, 



