1. Department of Entomology, Cornell University, Comstock Hall, Ithaca, NY 14853 (smv32@cornell.edu; ocw7@cornell.edu; lch27@cornell.edu)
2. Current Address: Biology Department, Grinnell College, Noyce Science Center, Grinnell, IA 50112
3. Current Address: Department of Pathology, Microbiology and Immunology, UC Davis, One Shields Ave., Davis, CA 95616
4. Corresponding author, e-mail: lch27@cornell.edu