320 
EASTERN ETHIOPIA 
XXVI 
flies cause by destroying horses is set forth in many 
interesting books written by missionaries, explorers, 
sportsmen, and hunters. 
It is not too much to state that in the early days of 
the exploration of the Dark Continent tracts of 
Tsetse Flies. 
A {Glossina palpalis) bites and infects men. 
B [Glossina morsitans) bites and infects horses. 
country known to harbour this pest (fly-belts) were 
more securely protected by it from the inroads of the 
explorer, than by the arrows, javelins, and spears of 
naked savages. 
In connection with the prevalence of fly-disease or 
“ nagana ” in Africa and its deadly effects on transport 
