1. H. A. Schnedderman, A. Krishnakumaran, P. J. Bryant andF. Sehnal, Agric. Sci. Rev. Coop. State Res. Serv. U. S. Dept. Agric.8, 13 (1970).
2. J. J. Menn andM. Beroza,Insect Juvenile Hormones, Chemistry and Action (Academic Press, New York 1972).
3. 6,7-epoxy-3,7-dimethyl-1-(3,4-methylenedioxy)phenoxy-2-nonene. Generous gift from Hoffmann-La Roche, Nutley, New Jersey.
4. 1-(4-ethylphenoxy)-6,7-epoxy-3,7-dimethyl-2-octene. Generous gift from Stauffer Chemical Co., Richmond, California.
5. Little Friskies cat food, carnation Co., Los Angeles, California.