1. Insects Affecting Man Research Laboratory, Agricultural Research Service, U.S. Department of Agriculture, Gainesville, Florida 32604
2. Department of Entomology, University of Florida, Gainesville 32611
3. Pesticide Research Laboratory, Food Science Department, University of Florida, Gainesville 32611
4. Metabolism and Radiation Research Laboratory, Agricultural Research Service, U.S. Department of Agriculture, Fargo, North Dakota 58102