54 



Report of Glossina Sub- Committee of the Imperial Bureau o! 

 Entomology. — Tyans. R. Soc. Trop. Med. c- Hyg., London, 

 xiv, no. 4, 19th November 1920, pp. 59-62. 



Attention is drawn in this report to the necessity for furtlier know- 

 ledge of the hfe-histories of Glossina spp., as well as their habits and 

 the factors that favour their increase or inhibit their spread, before 

 the wide areas over which they range can be reduced. The measures 

 hitherto recommended for the eradication of tsetse-f^ies cannot be 

 effectively carried out over large stretches of country, and will only 

 prove useful in restricted portions of such areas if persistently 

 maintained over a considerable time. 



An essential line of investigation will be a thorough survey in each 

 infested locahty. The surveys will require checking at intervals 

 throughout the year, and should include estimates, on a standard 

 ]:>asis, of the density of the fly. The points suggested for observation 

 and experiments are distribution of the flies, effects of clearing, breeding- 

 grounds, food of the flies, their parasites and other enemies, destruction 

 of adults, and influence of odours. Zululand, Southern Rhodesia, 

 Nyasaland, Tanganyika Territory, the Sudan and Northern Nigeria, 

 are suggested as the most suitable countries for the establishment 

 of experimental stations to investigate these problems. The precise 

 areas selected in these countries should represent different types of 

 environment, and should, as far as possible, be situated in localities 

 in which the presence of tsetse-flies is actually obstructing settlement 

 or is hkely to do so in the near future. Suggestions are made for 

 the organisation of the staff for these stations, which, as the work 

 progresses, wifl necessarily include a protozoologist. 



YoRKE (W.). Research into the Trypanosomiasis Problem: a Critical 

 Consideration of Suggested Measures.^ Tmws. R. Soc. Trop. 

 Med. & Hvg., London, xiv, nos. 3 and 4, 15th October and 19th 

 November 1920, pp. 31-47 and 49-59. 



The recommendations in the foregoing report are criticised mainly 

 on the ground that they deal only with the entomological aspects 

 of the problem. The reading of the paper led to a considerable 

 amount of discussion of a controversial nature. 



Buxton (P. A.). The Capitulum of Psoropies {Acannsi).'- Parasitology, 

 Cambridge, xii, no. 4, December 1920, pp. 334-336, 2 figs. 



This account of the capitulum and mouth-parts of Psoroptes has been 

 prepared as a preliminary to investigations that are being made 

 upon the bionomics of the itch mites. The material used has been 

 identified as Psoroptes eqiii, but it is considered probable that nearly 

 all the forms of Psoroptes occurring on domestic animals are merely 

 races or varieties of a single species. 



Basii.e (C). Leishmania, Herpetomonas, and Crithidia in Fleas. — 

 Parasitology, Cambridge, xii, no. 4, December 1920, pp. 366-377. 

 2 plates. 



In the intestines of various insects, and of fleas in particular, certain 

 Protozoa of the herpetomonad and crithidial types have been observed. 

 Their relationship to Leishmania is here considered. Though in 



