190 



extremely rare in tlie Iiikissi valley, but they are attacked to the same 

 extent by Glossina as are black or brown animals. While the fly 

 certainly prefers a dark colour, when a herd is composed entirely of 

 white individuals, it attacks them readily. Animals kept in the villages, 

 which never go down to the river, are found to be equally afiected, 

 because other pigs that are running free bring back Glossina palpalis 

 to the village, and animals that are tied up close to the huts are much 

 worried by the flies. 



In the Kisantu region, the villages are generally fairly close to the 

 forest, while in the Tumba-Mani region, in addition to the fact that 

 the district is less wooded, a certain amount of clearing has been done, 

 so that the villages are separated from the forest by open spaces 

 several hundred yards wide. In spite of this, though a notable 

 diminution of sleeping sickness is observable in the former region, it 

 continues to rage in the latter, the reason being that in Kisantu the 

 examination of natives and the treatment of the sick has been carried 

 on regularly for several years, with the result that the flies brought 

 into the village by the pigs no longer constitute a source of great 

 danger. In the Tumba-Mani region, on the contrary, where 

 examination and treatment are difficult, the fly always finds carriers 

 of the parasite in the villages and is able to spread infection. 



Sergent (Edm.) & Sergent (Et.). Nouvelle Methods de Destruction 

 des Moustiques par rAlternance de leur Gites. [A New Method 

 of Mosquito Control by an Alternation of Breeding-places.] — C. R. 

 Hebdom. Acad. Sciences, Paris, clxv, no. 14, 1st October 1917, 

 pp. 436-437. 



The subject matter of this paper has already been abstracted [see 

 this Review, Ser. B, iv, p. 93]. A modification of the method there 

 described consists in distributing the water to the right and left of its 

 channel alternately, by means of a series of barrages, allowing it to 

 soak into the soil from which it evaporates in less than a week, the 

 same area not being flooded again for several weeks. This necessitates 

 the making and removal of small earthen dykes in the channel each 

 week, instead of cutting two alternative channels. 



Aragao (H. de B.). Espirochetose (Treponemose) das Gallinhas. 



[FowlSpirochaetosis.] — Rev. Vet. e Zootechnia, Rio de Janeiro, vii, 

 no. 1, 1917, pp. 3-10. [Received 15th October 1917.] 



Spirochaetosis in fowls, which is carried by the tick, Argas persicus, 

 may be successfully treated by serum injections or organic arsenicals, 

 such as atoxyl (0'03 grammes per kilo weight of the animal treated) or 

 salvarsan (0'035 grammes). Prophylactic measures should include 

 hygienic methods in the construction and upkeep of fowl-houses. 



Chagas (C). Processes patojenicos da Tripanozomiase americana. 



[Pathogenic Processes of American Trypanosomiasis.] — Mem. Inst. 

 Osivaldo Cruz, Rio de Janeiro, viii, no. 2, 1916, pp. 5-36, 2 plates. 

 [Received 18th October 1917.] 



This paper aims at giving a definite clinical conception of American 

 trypanosomiasis or Chagas' disease. In Brazil the distribution of the 



