75 



statements which have been made in England to the efEect that sleeping 

 sickness is increasing and spreading in Rhodesia, and it is contended 

 that these are entirely contradicted by the evidence available. It is 

 now accepted that, although certain unfavourable climatic conditions 

 exist to a more marked extent in some districts than in others, trans- 

 mission of trypanosomiasis is possible wherever tsetses occur, but the 

 disease is Ukely to remain sporadic in character. 



An outline is given of the general programme for future entomological 

 work. Mr. LI. Lloyd, since the termination of the Luangwa Com- 

 mission, has made experiments at Ngoa on the effect of the blood of 

 different animals upon the breeding capacity of the fly. The pupae 

 produced by the series fed upon mammals were on the average slightly 

 larger than the others, but otherwise there appeared to be no special 

 advantage in a mammalian diet. Mr. Lloyd also carried out a series of 

 experiments to determine whether G. morsitans will feed on small 

 mammals, birds, reptiles or amphibians. Twenty-nine experiments 

 were made, wliich included lizards, chameleon, toad, fowl, rat, mouse, 

 burrowing rodent, mongoose, bat, shrew and caterpillars, from the 

 results of wliich it would seem that these animals do not provide a 

 suitable food supply for the fly. 



Telfer (W.). Report on the Bloodsucking Flies on the Volta River. 



Enclosure from the Governor of the Gold Coast to the Colonial Office. 

 Tamale, 12th August 1913. [Received 17th Feb. 1914]. 



This is the report which was asked for, with a view to opening up the 

 Volta River, from Yapsi to Yeji, for transport purposes. Dr. Telfer 

 found no population on the river banks and only a sparse one inland. 

 No cases of sleeping sickness were found, though a number of blood 

 films were taken from the inhabitants including some fifteen canoe- 

 men employed on the river ; one case was however reported by the 

 District Commissioner at Yeji. Guinea worm and conjunctivis were 

 prevalent. Biting flies were numerous, consisting of Glossina palpalis 

 37 per cent., G. tachinoides 55 per cent., Tabanus spp. 5 per cent., and 

 Haematopota spp. 2 per cent. These flies were found in the under- 

 growth on the banks of the river and in the dense bush outside the 

 villages. Glossina spp. were never found more than 40 feet from the 

 river bank. Both banks of the river from Yapsi to Yeji are continuous 

 fly belts. The author considers that if the waterway is to be used by 

 Europeans rest-houses should be built, or tents and a fly-proof room 

 provided. 



L' Agriculture du Congo Beige. Rapport sur les ann6es 1911 et 1912. 

 Deuxieme Partie. L' Agriculture au Katanga. [Agriculture of the 

 Belgian Congo. Report for the years 1911-1912. Second Part. 

 Agriculture in Katanga.] — Bull. Agric. Congo Beige, Brussels, iv, 

 no. 2, June 1913, pp. 441-445. [Received 20th Mar. 1914]. 



Chapter 6 deals with the tsetse-fly, which occurs throughout the 

 copper-mine districts and abounds around Ehsabethville and Kam- 

 bove. In 1912 Dr. Rhodain found G. morsitans to the west of the 



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