( cxlviii ) 



little papyrus, altogether wilder-looking. Victoria is shallow : 

 1 do not think its maximum depth reaches 600 feet, whereas 

 Tanganyika has been sounded to 6000 feet without touching 

 bottom. In shape, of course, they are very different, and 

 herein probably lies the reason of the difference in depth. 

 Tanganyika fills up part of a great rift, whereas Victoria is 

 merely a huge rain-puddle. The well-known fauna of Tan- 

 ganyika is, of course, very different. I secured shells like 

 Nassa, Trochus, Littorina, but some of the most peculiar 

 species have to be dredged for. Such fish as I saw being 

 sold were totally different from the ones I know in Victoria. 

 Curiously enough, during all the time I was on Tanganyika 

 I saw and heard no signs of the great fish eagle (I believe its 

 name is Haliaetus vodferans) which is so conspicuous on 

 Victoria, though I am told it exists on the lake. The flora 

 seemed very different — very few of the common bushes on 

 Victoria were noted on Tanganyika ; and I saw many trees, 

 shrubs, and flowers new to me. I wished I had had time to 

 collect insects on the forested hills of the western shore. 

 Some day I hope to return home by that route. From L. 

 Tanganyika to Boma, the ocean port at the mouth of the 

 Congo, I believe takes 20 days or so." 



Among the specimens captured at Kigoma on Jan. 9 were 

 a Fossor of the genus Trypoxylon near confrater, Kohl, and 

 the following Coleoptera — Oxyihyrea vitticollis, Boh., Lacco- 

 ptera turrigera, Boh., Asjridomorpha parummaculata, Boh., and 

 Mesoplatys ochroptera, Stal. 



" Mar. 1, 1918. 



" I wrote to you last from Dar es Salaam that I was just 

 off on a tour up-country again to tackle an outbreak of plague 

 in a district named Singidda, X. of the railway and S.W. of 

 Aiuslia. I have just returned to the headquarters of the 

 Political Officer at the conclusion of the tour. Curiously 

 enough, I never saw a case. The epidemic appears to have 

 begun in mid-January, and there must have been about 100 

 deaths, but the people left the infected houses and bolted 

 into the bush, so that the outbreak was more or less stayed 

 (though 1 have heard of three more deaths in the district 

 since I left it). I investigated about 112 deaths, of which 



