IN THE ILORIN PROVINCE OE NORTHERN NIGERIA. 7 



The Western Division. 



In the western division of the province the country is thickly populated and 

 well cultivated, and, in consequence, many of the streams are but lightly shaded 

 by trees. Tsetse-flies are correspondingly scarce, and I have often spent an 



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5ca.lt !• 97 mi to fc» f*/*cH. 

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10 fia-Louu-n. 



Fig. 3. — Sketch-map of the Oyun River showing the points at which tsetse-flies were 

 taken between the Balogun road and Oyun River railway-station. 



hour or more waiting at a likely spot before taking a single specimen. I have, 

 however, never failed to find the flies eventually where there was deep shade 

 and either a stream or pools of water, except in the cases of one or two isolated 

 patches of bush." In the immediate vicinity of Ilorin town I was able myself to 



•■ See p. 13. 



