1. Wildlife Health Laboratory, California Department of Fish and Wildlife, Wildlife Genetics Research Unit, Sacramento, CA 95834, USA
2. Department of Evolution, Ecology, and Behavior, University of Illinois Urbana-Champaign, Urbana, IL 61801, USA
3. Department of Entomology, University of Illinois Urbana-Champaign, Urbana, IL 61801, USA
4. Program in Ecology, Evolution, and Conservation Biology, University of Illinois Urbana-Champaign, Urbana, IL 61801, USA
5. School of Plant Sciences, University of Arizona, Tucson, AZ 85721, USA
6. Department of Entomology, University of Georgia, Athens, GA 30602, USA
7. Department of Biology, Boston University, Boston, MA 02215, USA