xvn ALONG THE GUASO NYIRO 227 



of these pests would in a short time prove fatal. I 

 therefore ordered two men to watch each horse and 

 flick off any flies that attempted to settle on them. 

 It was probably owing to these precautions that the 

 horses escaped, but as none of the other animals 

 died, it is possible that the tsetse-fly of these parts 

 may not be infected. 



