16 



from Zululand at any rate to the northern boundary of the East Africa 

 Protectorate " [Kenya Colony] (Austen) ; the species also " occurs in 

 Portuguese East Africa, the Nyasaland Protectorate, north-eastern 

 Rhodesia, German East Africa [Tanganyika Territory], and the Uganda 

 Protectorate," besides being found in the south-eastern portion of 

 Belgian Congo. Its existence in Italian Somaliland, on the middle 

 and lower Shebeli River, was reported by Croveri (35) in 1919. 



" The occurrence of G. pallidipes in the Mozambique district of 

 Portuguese East Africa is recorded by Professor Laveran, who states, 

 on the authority of M. G. Vasse, that in the region in question G. 

 pallidipes is found at higher altitudes than G. morsitans. In the 

 East Africa Protectorate [Kenya Colony], however, where it is said 

 to be more widely distributed than any of its congeners, G. pallidipes 

 has not been observed at an altitude of more than 5,000 ft. In the 

 Uganda Protectorate, Dr. R. van Someren .... states that 

 the present species occurs, in company with G. morsitans, Westw., in 

 several localities in Toro " (Austen). 



It may be added that, according to Dr. S. A. Neave, G. pallidipes, 

 Austen, is met with chiefly in the littoral region of East Africa, whence 

 it ascends the valleys of the principal rivers, more especially near the 

 equator. In the west and north-west of Uganda it is found in some 

 numbers, particularly in the Semliki Valley (eastern frontier of Belgian 

 Congo) . 



Glossina longipalpis, Wied. Of this Tsetse-fly Austen writes : 

 " Precisely similar to Glossina pallidipes, Austen, in general appearance, 

 but distinguished by the last two joints of the front and middle tarsi 

 having sharply denned and conspicuous clove-brown tips, and in the 

 male sex by the front not being distinctly narrower at the vertex." 



According to the same authority, " the authenticated area of distri- 

 bution of Glossina longipalpis," which is " essentially a West African 

 species," extends from Senegal to the Katanga district of Belgian 

 Congo. In 1917 the species was recorded by Bouet and Roubaud (13) 

 as occurring in the Ivory Coast, and Roubaud (1230) has since stated 

 that at the present time G longipalpis is found all along the Ivory 

 Coast Railway, between Dimbokro and Bingerville. He thinks, 

 however, that the existing distribution of the fly in this region is the 

 result of the construction of the line and of the traffic upon it. 



GROUP III. 



In the two remaining groups of Tsetse-flies, the upper surface of the 

 abdomen does not exhibit the markings characteristic of the Glossina 

 morsitans Group, that is to say, the abdominal markings do not consist 

 of " interrupted dark bands on a pale ground." 



The distinctive characters of the Glossina fusca Group (Group III) 

 are given by Austen as : " Wings fairly dark (dull sepia-coloured), 

 palpi (except in G. tabaniformis, Westw.) long and slender." 



Glossina fusca, Walk. (Newsteadina fusca, Towns.). Of this 

 Tsetse-fly, Austen writes : " Large, dark brown, dark-winged species, 

 with long and slender palpi, and without distinct dark bands on the 

 abdomen, which is lighter at the base ; in general appearance very 

 closely resembling Glossina nigrofusca, Newst., but distinguishable 

 in both sexes by the third joint of the antennae not being clothed with 

 long and fine pale hair, forming a conspicuous fringe down the anterior 

 and posterior edges." 



