Florence E. Jarvis 45 



me-iiot, brook-limo: tiulpoles and dragonfly nymphs and pupae abun- 

 dant. 31. V. 1918, wind S.E., hot and sunny; 2 mature larvae found. 



Chelsea Physic Garden. Several artificial ponds with algae, Elodea, 

 water-hhes or rushes; 27. xi. 1917 and 2. vi. 1918, no larvae found; 

 15. viii. 1918, in one pond with many rushes were found 8 larvae 

 (imagines reared). 



Hamjjstead Extension Fields. Muddy swamp, overgrown with reeds, 

 enlarging at one end into a shallow pond with filamentous algae and 

 flowering plants; trees near, houses at no great distance. 15. vi. 1918, 

 no larvae found. 2. ix. 1918, from pond w^ere taken two larvae and one 

 pupa, also C. pipiens; from swamp, Culex jjipiens and 2 larvae of 

 Ochlerotatus nemorosus. 



Regent's Park. Artificial stream in the grounds of Bedford College. 

 Stream arranged in a series of terraces; water had not been turned on 

 for some months, but rain had collected to varying depths; water con- 

 tained fallen leaves, while long grass hung in from edges. 22. xi. 1917 

 and 1. vi. 1918, no larvae found. 2. viii. 1918, water at a depth of about 

 six inches, wind S.E. to S. ; numerous larvae, mostly well-developed, a few 

 young forms; swarms of larvae and pupae of C. pijnens present. 

 7. ix. 1918, 4 young larvae, also C. pipiens, though less abundant than 

 in August. 



Wanstead Park. Three large ponds. A, B, and C. A, nearest the main 

 road, is shallow, with clumps of rushes at either end, banks not grassy; 

 B has concrete edges, no plants, and is used for boating; while C is 

 shallow, especially at one end where there are water-plants, and is 

 surrounded by trees. 8. vii. 1918, numerous larvae among the rushes in 

 A ; 3. ix. 1918, 2 full-grown larvae from shallow end of C. 



Woodford. Small pond at the side of the main road immediately 

 beyond the termination of the electric tramway. Water dirty, containing 

 much weed, mainly Ranunculus, debris, filamentous algae and dead 

 leaves. 8. vii. 1918, eggs, larvae and pupae abundant; a second larger 

 pond, further from the road, deeper and with less weed, yielded a few 

 larvae. 



London, Albert Dock. Larvae, 1901 (B. Mus. Map, p. 11). 



2. Anopheles bifurcatus, L. 



Southend, Catford. Swamp on the course of the river Ravensbourne 

 (see under A. maculipennis) . 23. xi. 1917, 19. ix. 1917 and 26. ix. 1917, 

 numerous larvae found, also larvae of Theobaldia morsitans; 29. iv. 1918, 

 2 mature larvae and several pupae; 4. vi. 1918, larvae and pupae of 



