1. Wigglesworth, V. B., “The Principles of Insect Physiology”, 5th ed. (Methuen, London, 1953).
2. Shigematsu, H., and Takeshita, H., J. Sericul. Sci. Japan, 27, 66 (1958).
3. Sissakian, N. M., and Kuvaeva, E. B., Dokl. Akad. Nauk., S.S.S.R., 113, 873 (1957); Biokhimia, 22, 686 (1957).
4. Shigematsu, H., and Takeshita, H. (in the press).
5. Shigematsu, H. (unpublished).