X INTRODUCTION 



In January 1912, a new site was chosen on Bugalla, 

 the largest island of the Sesse group, lying in the north- 

 west corner of the lake, and fourteen months of unin- 

 terrupted residence were spent there, after which I went 

 home on leave, returning in December 1913. On arrival 

 at Entebbe I met Mr. W. F. Fiske, from the States, 

 who had been deputed by the Tropical Diseases Bureau 

 of London to investigate Glossina morsitans, and had 

 decided to first make the acquaintance of palpalis, 

 the problems connected with which seemed more 

 readily soluble, and by their solution might throw light 

 on morsitans. He had decided, as a result of several 

 months' previous work, to undertake a tour of the chain 

 of islands lying parallel with the north shore of the lake, 

 in order to compare one with the other, hoping that the 

 presence or absence of Glossina might be found to be 

 correlated with definite factors. He proposed that 

 I should join him, and we made the tour together, very 

 greatly to my benefit not only regarding Glossina in 

 particular, but in field work in general, his wide experi- 

 ence of field entomology and acute powers of observation 

 showing me how much I had missed when working by 

 myself. At the close of a tour of about two and a half 

 months Fiske left for another part of Uganda, and I 

 settled down on the western spur of Kome Isle to carry 

 out a year's continuous cycle of experiment and observa- 

 tion on the smaller islets within working distance 

 (Ngamba, Nsadzi, Kizima, Tavu, Bulago, Kimmi). 

 Unfortunately this was brought to an end by the out- 

 break of war ; for in August 1914 I was called off for 

 duty with the troops on the Uganda-German frontier, 

 and subsequently with the Belgian Northern column 

 under Colonel Molitor, which invaded German East 

 Africa via Kigezi and Ruanda, to Tabora, after which 

 my duties took me to various parts of German East 

 Africa and Portuguese East Africa. When released from 



