103 



influence the economic importance of the country, are reviewed. The 

 recrudescence of malaria and its reappearance in certain districts 

 that appeared to be free from it are considered to be somewhat analagous 

 with the observations of Sergent in Algeria [R.A.E., B, x, 49, 50, 70]. 



ScHLUPP (W. F.). Fumigation with Sulphur.—//. Dept. Agric, 

 Union S. Africa, Pretoria, iv, no. 2, February 1922, pp. 132-140. 



Although sulphur as a fumigant is decidedly inferior to cyanide 

 and carbon bisulphide, its comparative safety and cheapness renders 

 it more suitable for use by inexperienced persons and in isolated 

 places where the use of other fumigants is impracticable 



To be effective sulphur should be used in very tightly sealed rooms 

 at the rate of 3 lb. per 1,000 cubic feet, and the fumigation continued 

 for at least 24 hours. Under these conditions poultry mites, Dcrmanyssus 

 gallinae, were killed, but not fowl ticks, Argas persicus, against which 

 hydrocyanic acid gas has proved even le'ss effective. Against bed- 

 bugs [Cimex] sulphur is fairly effective provided that the above 

 conditions are adhered to. It also apparently destroys the eggs, but 

 is less reUable than cyanide, and a second application should therefore 

 be made from two and a half to live weeks after the first. 



Lamborn (W. a.). The Mosquitos of some Ports of China and Japan. 



— Bull. Ent. Res., London, xii, pt. 4, February 1922, pp. 401-409. 



The enquiry into the distribution and prevalence of the yellow 

 fever mosquito, Aedes argenteus, Poir. {Stegomyia fasciata, ¥.), in 

 certain Far Eastern ports, which was begun in 1915 [R.A.E., B, 

 viii, 113], has been continued by a further survey, including the ports 

 of Fuchow, Shanghai, Nagasaki, Kobe and Yokohama. Lists are 

 given of the mosquitos found at each of these places, with notes on 

 their breeding-places and on the climate, situation and conditions 

 in which they occur. 



The survey has confirmed the opinion formed in consequence of • 

 the above-mentioned investigation, that the conditions in the ports 

 of China and Japan would prove to be unfavourable for the propagation 

 of A. argenteus, even in the warmer months. There have been ' 

 isolated records of its occurrence in Kowloon and in Formosa, indicating 

 that occasional individuals may find their way north, but as a factor 

 in the spread of yellow fever they would appear to be neghgible. 

 The possibihty of the estabhshment of yellow fever in the ports visited 

 seems to depend on the potentiahty of Aedes {Stegomyia) alhopictus 

 and perhaps Aides togoi and A. japonicus as vectors ; in Shanghai, 

 and probably also in Fuchow, these species are not found during 

 the colder months, though in Japan, which has a milder chmate, the 

 adults might be active throughout the year. 



Patton (W. S.). Notes on the Species of the Genus Musca, Linnaeus. 

 Part I. — Bidl. Ent. Res., London, xii, pt. 4, Februarv 1922 

 pp. 411-426. 



The data relating to the germ-transmitting capacity of Musca 

 domestica, L., and its allied species are very incomplete, in spite of 

 the importance of these flies as carriers of the bacilli of enteric fever. 



