135 



the need for organised investigations. The existing restrictions and 

 precautionary measures adopted by the Germans are being carried 

 out as far as possible. So far no case of human trypanosomiasis of 

 either form has been found by the civil staff. 



Rose (F. G.) . Report of the Government Bacteriologist, British Guiana, 

 to the Tropical Diseases Research Fund Committee for the period 

 January 1919 to March 1920.^Proc. R. Soc. Med., Sect. Trop. 

 Dis. & Parasit., London, xiv, pt. 8, June 1921, pp. 1-17. 



This report includes the results of investigations to determine the 

 usual mosquito carriers of Filar ia bancrofti in Georgetown. 

 Some 1,500 female mosquitos were dissected, of which 237 were 

 Stegomvia fasciata , 105 Anopheles {Cellia) argyritarsis, 27 Taeniorhyn- 

 chits (Mansonia) titillans, and 1,131 Culex fatigans. The latter is 

 apparentlv the only carrier of Filaria bancrofti of any practical 

 importance in Georgetown. Approximately 7-4 per cent, of this 

 species were found to be infected with the organism, which was not 

 found in any of the other mosquitos. 



Lanzenberg (A.). Un Cas de Paludisme autochtone a Plasmodium 

 praecox. — Bull. Soc. Path. Exot., Paris, xiv, no. 5, 11th May 

 1921, pp. 266-268. 



Before the war the cases of malaria in France in the endemic centres, 

 or the few isolated cases occurring near patients from abroad, were 

 all due to Plasmodium vivax, the agent of benign tertian, and it seemed 

 that indigenous Anophelines were incapable of developing or trans- 

 mitting P. malariae or P. praecox {falciparum). 



The large influx of malaria Carriers from abroad has, however, led 

 to numerous cases in France, and a few of these are due to P. praecox. 



Keukenschrijver (N. C). Eenige Waarnemingen over Malaria 

 bij de Hollandsch-Amerikaansche Plantage Mij. te Kisaran. 



[Some Observations on Malaria at the Dutch-American Plantation 

 Company's Estates at Kisaran.] — Geneesk. Tijdschr. Ned.- Indie, 

 Batavia, Ixi, no. 2, 1921, pp. 202-210, 2 plates. 



Kisarang is situated about 12 miles from the coast of Sumatra at 

 an altitude of about 60 ft. The soil, consisting chiefly of clay and 

 sand, is very impermeable. Malaria is due to the resulting bad 

 drainage and to the river beds being too high as compared with the 

 land around them. 



The following Anophelines occur in the virgin forests : — Anopheles 

 barbirostris , A. umbrosiis, A. hyrcanns {sinensis) and A. leucosphyrns. 



In the rubber plantations the species found are A . barbirostris (very 

 few), A. umbrosus (few), A. novumbrosus {similis, Strickl.) (sporadic), 

 A. albotaeniatus (few), A. kochi (numerous), A. indefinitns (formerly 

 abundant, now sporadic), A. puncttdatus (sporadic), A. fuliginosus 

 (a few specimens), A. leucosphyrns (a few specimens), and A. hyrcamis 

 (formerly few, now more numerous). 



In buffalo-sheds the percentages of Anopheles to Culex were from 

 2 to 5 per cent. ; sometimes, however, 30 per cent, of A. indefinitns 

 were present. None of the Anophelines captured in the buffalo- 

 sheds were infected, but one specimen of A. kochi, taken indoors, was. 



