272 GLOSSINA PALLIDIPES [CH. 



Uganda. " They were numerous along the native path, in long 

 grass with scattered trees, for a quarter of a mile before reaching 

 the forest. They attacked freely at 8.30 a.m. on a summer 

 morning, were easily caught with the hand, and were observed 

 to bite through a worn blue service puttee. They were seen 

 and caught along the native path after entering the forest, 

 and for two miles the other side of the belt, which is only 

 about 300 yards in width, occasional flies being seen until the 

 village was reached. Half-an-hour after arrival two were 

 captured by my boys in camp and brought to me. On return- 

 ing from the village next day no flies were seen until nearing 

 the forest, so that the ' occasional ' flies mentioned above may 

 all have been ' following' flies. If so, they follow much further 

 than G. palpalis. There are many rhino, pig, and buffalo in 

 the forest, and Colobus monkeys are numerous. There are no 

 natives nearer than two miles, but a well-trodden path connects 

 two villages, and passes through the fly. The natives know of 

 the fly but do not consider it dangerous to animals. They 

 keep sheep and goats, and drive them along this path. No 

 cattle are kept for many miles round." 



In British East Africa, Dr P. H. Ross found that G. pallidipes 

 generally occurs on the edge of the bush or in open spaces 

 where animals, chiefly goats, graze, but never at any great 

 distance from water. It is easily found from July to October, 

 the dry season, but during the rest of the year is practically 

 absent. In this locality the fly is frequently attracted by the 

 lights of trains, etc., and has been observed to enter railway 

 carriages and be transported a distance of at least 150 miles. 



In Mozambique, Dr Sant' Anna found several areas infested 

 with fly. These areas consist of forests of low trees with poor 

 foliage and of somewhat short and scattered herbaceous vegeta- 

 tion, with few shrubs. The tsetse-flies are usually very rare but 

 in some regions they occur in large numbers. In the largest 

 of these areas, known as Maganja da Costa, to the east of the 

 river Ticugo, the flies occurred in enormous numbers in the 

 native huts. Although the species is stated to be morsitans 

 all the flies sent from this locality were determined by Austen 

 as G. pallidipes. 



