63 



farm, on the extreme edge of Marungu. This, however, was certainly 

 an accidental occurrence, coinciding with the arrival at the farm of 

 native caravans. 



During his agricultural prospecting expedition, in 1914, M. M. 



Vermeesch observed that Glossina morsitans infests the entire eastern 



slope of the Bianos, and is very widely distributed throughout the 



basin of the Dikuluwe and its affluents, the only exceptions to this rule 



[ being the Upper Pande (Kapiri-Kansenia), the Upper Loami and the 



[ Upper Movia. Throughout the entire northern portion, including the 



( basins of the Kabengo-Lukenshi, Luvilombo-Kabinde, Lisele-Kanianga, 



Dikuluwe and Lufira, G. morsitans is even very abundant, and M. 



: , Vermeesch does not consider that its disappearance in the immediate 



! future is at all likely. 1 



It is much to be wished that the attention of medical officers, 



veterinary surgeons and agricultural officials may be drawn to the 



study of the distribution of Glossina morsitans in Katanga. Those 



i who desire to contribute to the elucidation of this subject should never 



( omit to collect, and send to Europe for identification, specimens of the 



' fly from each locality where it is observed, since by so doing possible 



confusion with other species of Tsetse-flies will be avoided. 



DISTRIBUTION OF THE OTHER SPECIES OF TSETSE. G. pallidipes, 

 Austen. We have seen, in Chapter II. , dealing with the general 

 distribution of Tsetse-flies, that the range of G. pallidipes includes the 

 south-eastern and eastern parts of the African continent. Dr. J. 

 Bequaert, in the course of his own investigations, never met with this 

 fly, but a number of specimens of it, taken on the Lualaba (Eastern 

 Province) a few hours north of Kongolo, were sent to him by Dr. Russo. 

 G. pallidipes appears to be fairly widely distributed throughout North- 

 Eastern Katanga, and, since in behaviour and general appearance it 

 closely resembles G. morsitans, it is possible to mistake it for the latter 

 species. For more detailed information concerning the occurrence of 

 G. pallidipes in North Katanga, the reader should consult the valuable 

 series of papers by Dr. Schwetz (132). 



G. Jusca, Walk. This species was taken by Dr. Schwetz in the 

 valley of the Lukuga, at a spot near Kanhogo, which lies on the bank 

 of the river ; a little later, with the assistance of his boys, he caught 

 a large number of flies, and found that the bag consisted of a mixture 

 of G.fusca and G. morsitans, in the proportion of 1 to 3. 



When he drew near to Mikato's village, he found that G. fusca 

 became gradually scarcer, disappearing completely when the place was 

 reached. There was nothing distinctive in this portion of the Lukuga 

 Valley, and yet this was the only part of it in which G. Jusca was 

 discovered by Dr. Schwetz. 



G. brevipalpis, Newst. It is stated by Dr. Bequaert that all the 

 large Tsetse-flies collected by the Mission Scientifique du Katanga, at 

 Kibombo, Kassongo (Manyema) (Dr. Pons), Kongolo (Dr. Rodhain), 

 and in the Luena Plain, one hour from Likongo (Sankisia) (Dr. Rodhain), 

 have been identified by Prof. Newstead as belonging to this species. 

 In the vicinity of Kibombo, G. brevipalpis seems to occur more or less 

 everywhere, but it is always extremely rare, and one may live in a 

 district for a long time without even suspecting its presence. 



1 M. Vermeesch, " Les Vallees de la Dikuluwe et de ses affluents, au point de 

 vue de leur valeur agricole " : Bull Agric. du Congo beige, Vol. v, no. 3, p. 516 

 Sept., 1914). 



