44 Tmmature Stages of Anopheles in London 



feeding close at hand; no trees; 26. ix. 1917; obs. Mrs A. Macdonald 

 (B. Mus. Map, p. 20). 



Baltersea Park. At shallow end of the Ladies' Pond, among rushes; 

 1. iii. 1918, no larvae or pupae found; 15. viii. 1918, wind 8.W., hot and 

 sunny, 6 young larvae obtained. 



Mitcham Common. Natural pond on golf-course, near L. B. and S. C. 

 Ry; edges very grassy, sloping gradually into water, which contained 

 weed; houses and cattle near, few trees; 14. v. 1918; 5 larvae, very young, 

 with several larvae of Ochlerotalus dorsalif; and 0. nemorosus and one 

 larva of Culex pipiens; 1. viii. 1918, wind S.E., hot and dull; eggs, larvae 

 and pupae abundant; also all stages of C. pipiens swarming. 



Putney Heath. Pond very much overgrown with rushes, leading into 

 ditch at each end; at side of main road; cattle and trees near, fishes seen. 

 21. V. 1918, no larvae found. 26. viii. 1918, wind W., showery, fine at 

 intervals, warm; mature larvae and pupae numerous. 



Richmond. (1) Ham Comymm. Broad ditch outside Ham (late, 

 bordered with rather thickly growing shrubs; water containing a quantity 

 of dead leaves; trees and cattle near, houses at some distance. 28. v. 19] 8, 

 no stages found. 10. vii. 1918, larvae and pupae numerous. 



(2) Richmond Park. Three ponds lying close together at a short 

 distance from Ham Gate; two of these were practically similar in charac- 

 ter, having the margins somewhat grassy and with short stiff sedge, and 

 containing much Ranunculus. The third was very shallow and grassy 

 and when visited on 13. ix. 1918 was almost dry. On 28. ix. 1917. 

 numerous mature and nearly full-grown larvae and several puj)ae were 

 obtained; on 2. x. 1917, larvae and pupae were rare, but occurred in all 

 three ponds; on 28. v. 1918, 6 young and 2 more devol()])ed laivae were 

 obtained from the first two ponds, while none were t'outul in The tiiird; 

 10. vii. 1918, all stages numerous in the fiist two ponds and a few in the 

 third; 13. ix. 1918, 3 mature and 4 younger larvae from the first two 

 ponds only. 



The Rookery, Streatham Comynon. Small ornamental ponds with 

 water-lilies and filamentous algae, connected by deeper ditches overhung 

 with shrubs; houses at a considerable distance. On 10. v. 1918, no larvae 

 found. 1. viii. 1918, wind E. to S.E., hot and cloudy; from one of the 

 deeper ditches were obtained 4 young huvae; the water had been changed 

 about two weeks previous to examination and was partly covered with 

 duckweed. 



Bushey Park. In broad stream connected with two ponds lying on the 

 Hampton side of the Diana Fountain; edges with coarse glass, forget- 



