Sheldon I Guttman1, Thomas K Wood2, Alvan A Karlin3. 1. Department of Zoology, Miami University, Oxford, Ohio, 45056. 2. Department of Entomology and Applied Ecology, University of Delaware, Newark, Delaware, 19711. 3. Tall Timbers Research Station, Route 1, Box 160, Tallahassee, Florida, 32303.