1. Department of Biology; Indiana State University; Terre Haute IN 47809 U.S.A.
2. National Wildlife Research Center; US Department of Agriculture, Animal and Plant Health Inspection Service, Wildlife Services; Ohio Field Station, 6100 Columbus Avenue Sandusky OH 44870 U.S.A.
3. Department of Biological Sciences; Purdue University; West Lafayette IN 47907 U.S.A.