150 



following on the cessation of the rain-;, when the pools and watercourses 

 cease to be washed with torrential storms, and mosquito larvae have 

 a chance to develop into imagines. Both malaria and black water 

 fever have, in the course of the year, aroused a considerable amount 

 of public interest and anxiety, especially in the Mazoe, Lomagundi 

 and Abercorn districts. This is only to be expected when it is con- 

 sidered how marked has been the forward movement which has taken 

 place in the last two or three years in the settlement of rural districts 

 where malaria and its sequelae are most rife and where n?w settlers 

 are especially exposed to infection. The parts of the country most 

 affected are the rich valleys and areas at altitudes under 3,500 feet, 

 though both malaria and blackwater are met wdth in practically every 

 district. An entomological survey of the country is required to 

 discover the distribution of the various Anophehnes and their relation 

 to disease. As these districts become more populated and as 

 land comes under cultivation and suitable houses are erected, there 

 is httle doubt that both malaria and blackwater fever will tend to 

 disappear. Except in the Sebungwe district, which has now been 

 depopulated, trypanosomiasis has so far not appeared in any other of 

 the fly areas in S. Rhodesia. Of individuals found infected in 1912, 

 all have died except one native who apparently recovered. The 

 whole country lying between the Sengwe and the Umniati Rivers 

 and the northern portion of the Lomagundi district have been thrown 

 open, and the destruction of the game within these areas has been 

 encouraged. If advantage is taken of this and the game reduced, 

 it is possible that some conclusion may be arrived at as to how far 

 the presence or absence of game affects the distribution of the tsetse fly. 



Fantham (H. B.) & Porter (A.). Some minute animal parasites or 

 unseen foes in the animal world. London : Methuen & Co., 1914, 

 319 lip. 50 tigs. 8vo. Price 5;- net. 



Protozoology, so far as it touches human life and needs, is the 

 subject matter of this book. One chapter is devoted to a general 

 account of sleeping sickness, trypanosomiasis of horses and cattle, 

 and the heipetomonads of fleas and lice. Spirochaetes and the diseases 

 caused by them, the researches of Nicole, Blaizot and Conseil on 

 the transmission of recurrent fever by lice, and the nature of hereditary 

 infection occupy another chapter ; malarial parasites, their con- 

 veyance by mosquitos and the relation of yellow fever to Stegomyia 

 fasciata are d'scussed at some length ; red water and East Coast 

 fever in cattle and the history of the cattle ticks inculpated, are 

 described, and Patton's researches into the relation of bed-bugs to 

 kala-azar and oriental sore are recorded. The remainder of the book 

 deals with bee and silkworm diseases and protozoal diseases of fish, 

 and a chapter is devoted to parasitic Ciliata, others to nasal polypus, 

 muscle parasites and the relations of the parasitic Protozoa to their 

 environment. In the final chapter the authors enlarge upon the 

 economic importance of the study of the Protozoa as illustrated by 

 loss of life from malarial fever, the interference with transport caused 

 by trypanosomiasis in animals, the great loss of cattle from red water 

 and East Coast fever and the like, and the important bearing of diseases 

 caused by these organisms upon the food supply of the United 

 Kinsfdom. 



