1. G. B. Staal, Ann. Rev. Ent.20, 417 (1975).
2. Y. T. Das and A. P. Gupta, Experientia30, 1093 (1974).
3. 6,7-epoxy-3,7-dimethyl-1-(p-ethylphenoxy)-2-octene (R-20458). Generous gift from Stauffer Chemical Co., Mountainview, California, USA.
4. 6,7-epoxy-3-methyl-7-ethyl-1-(3,4-methylenedioxyphenoxy)-2-octene (Ro 20-3600). Generous gift from Hoffmann-La Roche, Nutley, New Jersey, USA.
5. Little Friskies® cat food, Carnation Co., Los Angeles, California, USA.