177 



vivax, the parasite of benign tertian, but in which the transmission of 

 P. falciparum, the sub-tertian parasite, has not been worked out ; 

 A. {Myzomyia) turkhudi, which has been regarded as one of the carriers 

 of P. falciparum in India, where zygotes of the parasite have been 

 found in its stomach ; A. palestinensis (sergenti), a common carrier 

 in Algeria and Spain, and in January 1917 found breeding abundantly 

 in the warm wells in the Dahkla Oasis (water temperature 80°-120° F.), 

 the adults being then abundant in camp and capable of transmitting 

 the subtertian parasite to freshly arrived troops, some of whom 

 contracted the disease within 10 days after arrival ; and A. {Myzor- 

 hynchus) mauritianus, a rare mosquito and one not regarded as playing 

 any actual part in the transmission of malaria in Egypt. 



Experiments carried out in the autumn of 1916 at Cairo with 

 A. pharoensis and A. turkhudi showed that the former can act as an 

 inefficient and occasional definitive host for the subtertian parasite, 

 a fact which is of interest in view of the prevalence of its congener 

 A. pulcherrima in Mesopotamia, where it is regarded as a probable 

 carrier ; on the other hand A. turkhudi proves to be an efficient, 

 definitive host of P. falciparum in Egypt. 



ViLLENEUVE (J.). SuF Phormia sordida, Zett. (Dipt.). [Regarding 

 Phormia sordida, Zett. (Dipt.).] — Bidl. Soc. Entom. de France, 

 Paris, 1918, no. 10, 22nd May 1918, pp. 158-159. 



The author having previously described Phormia sordida, Zett., as 

 a form distinct from P. azurea, Fall, [see this Review, Ser. B, iv, p. 16], 

 it has been contended that the former is merely the female of P. azurea. 

 This paper points out that P. sordida is a distinct variety, differing 

 in both sexes from the typical form of P. azurea, the differences 

 having probably arisen under the influence of biological conditions. 



Feytaud (J.). Les Moustiques. [Mosquitos.] — Bull. Sac. Etude Vulg. 

 Zool. Agric, Bordeaux, xvii, nos. 6-7, June-July 1918 ; pp. 49-56, 

 67-71, 4 figs. 



These articles deal in a popular manner with the general characters 

 of mosquitos and the special clanger of the Anophelines, as well as 

 with methods of personal protection and of anti-larval measures of 

 control. 



Bodkin (G. E). Report of the Economic Biologist.— 5nY. Guiana 

 Dept. Sci. & Agric, Rept.for the Year 1916, Georgetown, 10th May 

 1917, 14 pp. [Received 11th July 1918.] 



Important investigations were made during the year into the 

 prevalence and control of Musca domestica (house-fly), particularly 

 in Government institutions and public buildings, where breeding 

 places had been allowed to accumulate with but little attempt to 

 locate or eradicate them. The danger of using lime-peel refuse from 

 lime factories as a top-dressing for young lime plants growing close 

 to dwellings is pointed out, thousands of fly larvae having been 

 discovered in the decaying mass of peel. 



A number -of poison-baits were tried, including various mixtures 

 of formaUn, molasses and vinegar. All these proved attractive, but 



