1. (1) Bates, M.: The natural history of mosquitoes. New York, Mac Millan Co., 1949.
2. (2) Christophers, S. R., Sinton, J. A. and Covell, G.: How to do a malaria survey. Delhi, Hith Bull., no. 14, 1936.
3. (3) Hosoi, T.: Influence of temperatures on the development of Culex pipiens var. pallens (a preliminary note) . Shanghai Sizenkagaku Kenkyusho Iho., 14, 339, 1944 (in Japanese) .
4. (4) Hosoi, T.: Egg production in Culex pipiens pallens Coquillett. 1. Seasonal changes., Jap. J. Med. Sci. Biol., 7, 1, 1954
5. (5) Huff, C. G.: Ovulation requirements of Culex pipiens Linn. Biol. Bull., 56, 347, 1929.