RESEARCH IN BRITISH WEST AFRICA. 329 
the top of the hill, and for about one mile inland the same flies have been 
frequently taken. Further inland these species are gradually replaced by G. 
morsitans [submorsitans|, this latter species being found in considerable numbers 
all over the plateau surrounding Baro. The belt is in places at least 4 miles 
wide. Hartebeeste is known to oceur on the plateau, and buffalo has been shot 
within recent times. It may be of interest to note that the tsetse-flies appeared 
to be attracted by grey flannel or sandy-coloured homespun cloth. 
“ An interesting fact emerges from the above observations, namely that at 
Baro G. palpalis is plentiful at a considerable distance from the river. As 
regards the relative prevalence of G. palpalis and G. tachinoides, the former 
was more frequently met with in the month of August, the latter in September, 
the number of G. palpalis having apparently diminished.” 
Since the above was written, Dr. Morrison caught one specimen of Glossina 
longipalpis on the top of the plateau. 
The new native town of Baro is situated about two miles up the line from the 
railway headquarters, on the side of the railway remote from the river. Close to 
the railway there runs a creek for a few miles; the country is thickly wocded 
and G, palpalis is abundant. Onward from the creek the country is much more 
open, while near Katcha (about ]4 miles) there is a large plain which extends 
Fig. 1.—Typical open grass country of the savannah type. 
for several miles on the left. Towards and around Egega (68 miles), the bush is 
only moderately thick, while in the vicinity of Kateregi (72 miles) it becomes 
much thinner, and the soil is sandy. At 79 miles the railway passes within a 
hundred yards of the river and here G. palpalis occurs. This region I traversed 
22036 D 2 
