39 



on the plains, where incidence of mahiria is high. No attempt has been 

 made by adjustment of weirs on the water channels to maintain 

 continual water interchange, with the result that stagnant water 

 is changed only at long intervals b}' rain or river overflow. As there 

 is no proper irrigation system or adjustment of soil and water levels, 

 pools are left in the fields which act as mosquito breeding-places. 



Satisfactory drainage and water control in districts where rice is 

 being gro\^^l, besides ameliorating the malaria and mosquito situation, 

 would also greatly assist in control of liver fluke of cattle and certain 

 Tabanid flies. 



VAN GoRKOM (W. J.). Dienst der Pestbestrijding. Verslag over het 

 eerste Kwartaal 1915. [Anti-Plague Service. Report on the 

 First Quarter of 1915.] — Meded. Burgerlijken Geneesk. Dienst in 

 Nederlandsch- Indie, Batavia, v, 1918, pp. 1-71. [Also in Enghsh.] 

 [Received 11th December 1918.] 



Fumigation of village dwelhngs as a means of combating plague 

 does not appear to be as elTective as at first supposed. Young rats, 

 small lizards and fleas sometimes survive this treatment. In villages 

 where only rat-plague was known cases of human- plague have occurred 

 after fumigation. Furthermore, plague sometimes returns after a 

 brief absence which has followed treatment, and rats escape while 

 preparations are being made. Besides mechanical measures and the 

 use of sulphur dioxide and li(iuids, experiments have been made with 

 hydrocyanic acid gas, but no definite conclusions were reached as to 

 the value of this agent. 



Baudet (E. a. R. F.). Het Onderkennen van Sarcoptes-, PsorojMs- en 

 C'Aon'o/)tes-schurftmijten. [The Differentiation of Sarcoptes, Pso- 

 roptes and Chorioptes Scab-Mites.] — Tijdschr. Vergelijkende 

 Geneeskunde, Gezondheidsleer, en Parasitaire- en Infectieuse Dier- 

 ziekien, Leyden, i, 1915, pp. 22-27, 6 plates, [Received 10th 

 February 1919.] 



The object of this paper is to indicate with the aid of micro- 

 photographs some special dili'erences between these genera. These 

 are of i)ractical value in making a correct diagnosis in cases of scabies. 



Roos (J.). Psoroptesschurft bij Paarden. [Psoroptic Mange in the 

 Yioi&Q.']— Tijdschr. Vergelijkende Geneeskunde, Gezondheidsleer, en 

 Parasitaire- en Infectieuse Dierziekten, Leyden, i, 1915, pp. 252-262, 

 1 plate. [Received 10th February 1919.] 



Horse mange due to Psoropfes, Dermatocoptes, and Dermatodectes 

 'Communis is less common than the sarcoptic and chorioptic forms. It 

 occurs on those parts of the animal where the hair is long enough to 

 protect the mites from being brushed away. In the case described 

 here, however, the places affected were nearly all on both sides of the 

 buttock and on the saddle. English investigators have believed that 

 Psoroptes and Sorcoples can sometimes occur together, but in this 

 case the latter was not found. An indispensable part of treatment 

 is close shearing. After removing any scabs and crusts the skin is 

 washed with a tepid soap-soda solution and this is followed by the 

 application of a tobacco decoction. An ointment containing 3 per 



