Frank V. Sances, former Post-graduate Research Assistant, University of California, Riverside, is now head of Pacific Agricultural Laboratories, San Diego; Nick C. Toscano is Entomologist, Cooperative Extension, U.C., Riverside; Larry F. LaPr is a private environmental consultant, Department of Entomology, U.C., Riverside. Earl R. Oatman is Professor of Entomology and Entomologist, Department of Entomology, U.C., Riverside. Marshall W. Johnson is Postgraduate Research Assistant, Department of Entomology, U.C., Riverside.