RESEARCH IN BRITISH WEST AFRICA. 199 
tsetse haunts. Near No-Kunda there is a small area of thick, low scrub, but the 
town itself stands in an open clearing, while between No-Kunda and Illiassa 
there is a long swamp which, at the time of my visit (March 10th), was prac- 
tically dry, except in one place where the crossing is muddy and the water about 
two feet deep. This swamp is an extension of two creeks, the Katchang Bolon 
and the Tunku Bolon. During the wet season, the overflow of the river would 
cover an area of considerable extent, and it is worthy of note that Glossina 
palpalis was afterwards caught at the mouth of the Katchang Bolon, so that it is 
more than probable that the range of this insect would extend in the wet season 
practically up to Illiassa. None were seen, however, on March 10th, when a 
strong Harmattan was blowing. 
At all the towns mentioned there were large herds of cattle, numerous goats, 
and not a few donkeys. Conversation with the headmen of the towns failed to 
elicit much reliable information either with regard to biting flies, sleeping- 
sickness, or diseases of cattle, but an attempt was made to find out the native 
names of the various blood-sucking insects. Some consideration of this will, 
however, be given in detail later. Hlephantiasis is very prevalent in nearly all 
these towns. 
Beyond Illiassa, the character of the vegetation changes somewhat. The first 
part of the way is the main road to Kubendar and is well cleared, but near 
Yalloll the road branches off to Farafeni and consists simply of a bush-path, first 
through thin low scrub and later through thin bush. Between the two Foulah 
towns of Yalloll and Fula Farafeni, the bush is thin and stunted, consisting of 
deciduous trees with little undergrowth, and is a haunt of Glossina morsitans 
(fig. 7). Wherever there are Foulah towns, there one sees large herds of cattle, 
but little cultivation and consequently little clearing. The head-man of Farafeni 
Fig. 7.—Path through thin deciduous bush between Yalloll and Fula Farafeni to show 
a typical morsitans-haunt, 
