1. Department of Entomology and Institute for Genomic Biology, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA.
2. Department of Crop Sciences, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA.
3. 454 Life Sciences, Branford, CT 06405, USA.
4. Department of Biology, University of Missouri at St. Louis, St. Louis, MO 63121, USA.
5. Neuroscience Program, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA.