180 



Scott (J. W.). Notes and Experiments on Sarcocystis tenella, Railliet. 

 — Jl. Parasit., Urbana, vi, no. 4, June 1920, pp. 157-166. 



The results of the observations here described are summarised by 

 the author as follows : — Sarcocystis tenella is apparently not an 

 aberrant form of one of the Cnidosporidia of insects, for lambs become 

 infected with this parasite without insects being present. Darling's 

 hypothesis that herbivorous animals are infected with Sarcosporidia 

 by insects is therefore probably untenable. It has been found that 

 lambs are more certain of becoming infected and that the number of 

 parasites per unit of muscle is greater if the animals are kept closely 

 confined in a screened cage than if they are allowed to run free in the 

 open. A second host other than the sheep does not seem necessary 

 for the development of S. tenella, and if this is true, a sexual stage of 

 this parasite will no doubt be found in the intestine of the sheep. 

 The method of transmission and the life-history will be dealt with in a 

 later paper. 



EwiNG (H. E.). U.S. Bur. Entom. A Gamasid Mite annoying to 

 Man. — Jl. Parasit., Urbana, vi, no. 4, June 1920, pp. 195-196, 

 Ifig. 



The mite, Hyletastes tnissouriensis, Ewing, is redescribed. In the 

 vicinity of Washington, D.C., it has been recorded as causing irritation 

 of the skin. It has also been taken from under bark in Illinois. Very 

 Httle is known of its biology and distribution. 



Brandt (F. R.). Trypanosomiasis. — Ann. Rept. Agric. DejJt., Northern 

 Provinces, Nigeria, 1919, Lagos, 1920, pp. 9-10. [Received 26th 

 August 1920.] 



With increased trade, and the annual movement of Fulani herds from 

 south to north, the spread of trypanosomiasis is nearly certain to 

 continue, as it is impossible at present to locate all the fly-belts. There 

 is great risk in introducing an animal from a tsetse -infested locality 

 into a clean herd, even in the absence of Glossina, since many biting 

 flies, such as Stomoxys, Haematopota and other Tabanids, are known to 

 act as mechanical carriers of trypanosomiasis. A number of outbreaks 

 in 1919 are noticed. 



Preliminary Report of the Anti-Malarial Commission. — Cairo, 1919, 

 55 pp., 7 plans. [Received 26th August 1920.] 



The work done by the sub-committees of the Anti-malarial Com- 

 mission in Egypt and the recommendations made by them are recorded. 

 The various breeding places of Anophelines m Egypt mclude desert 

 water ; permanent marshes and lakes into which most of the arterial 

 drains of the Delta flow ; badly aligned canals and drams, fosteimg 

 vegetation ; dead ends of canals ; borrow-pits and outcrops of 

 infiltration water. Any attempt to abolish all possible breeding 

 places at present is considered impracticable, but work has already 

 been started dealing with the best defined centres and including certain 

 measures of precaution to protect as far as possible the chief centres of 

 population from continued infection. These include the Suez Canal zone 

 and the oases. The nature and extent of future measures will depend 



