﻿OF MURI PROVINCE, NORTHERN NIGERIA. 221 



contain one or two cases of rather chronic trypanosomiasis, which is undoubtedly 

 endemic along this river. 



As before said, the fly on the river is chiefly tachinoides^ but with this, in 

 localised patches and in far smaller numbers, is associated jmlpalis. Practically 

 the entire fringe of the river in the Province is full of tachinoides, and a canoe 

 journey at certain points is extremely uncomfortable. The fly seems to be a 

 master in flanking tactics and to possess a diabolical ingenuity in waiting to 

 attack till the attention of its victim has been distracted from its presence. 



At Ibi, in spite of much clearing, tachinoides is very annoying in the bungalows, 

 It is noted particularly that when a native with a dark gown comes to the house, 

 he leaves a tachinoides behind him. This happens even if he be met outside the 

 house by some servant, as the fly will follow the latter into a shady room. 



From the middle of December to the middle of May the fly is much less 

 troublesome, but it is never quite absent from the bungalows or offices, and it can 

 always be found in the marsh near the river. 



With regard to the extension of the fly-areas, it seems probable that localities 

 previously free are becoming infested, and that in 1911 the tsetse along the 

 Benue, in Muri Province, were more numerous than they have recently been. 



There is in the Munshi Division, and in the northern part of the Province, a 

 small black breed of cattle which is apparently immune to tsetse. At any rate 

 these cattle can be kept in the Munshi district where no horses can live and 

 where imported Fuhlani cattle all die. I have not yet obtained any blood-films 

 from these animals. 



It is interesting to note that the Munshis are great hunters and that they have 

 practically destroyed all the wild game in their district, and yet, in spite of this, 

 the trypanosomiasis of cattle and horses is rampant. Native dogs and European 

 cats also suffer, from this disease. 



Doctors Flood, Watson, and others have toured the Munshi Division and 

 have, I believe, shown that tachinoides is the most common of the tsetse-flies 

 there found. 



In the accompanying sketch-map the squares indicate the presence of 

 G. tachinoides, while G. palpalis is indicated by a circle and G. morsitans by 

 irregular hatching. 



