1. Department of Biological Sciences, Simon Fraser University, Burnaby, British Columbia, Canada V5A 1S6
2. Royal BC Museum, Victoria, British Columbia, Canada V8W 1A1
3. Museum of Comparative Zoology, Cambridge, MA 02138, USA
4. Denver Museum of Nature and Science, Denver, CO 80205, USA
5. Department of Biology, Brandon University, Brandon, Manitoba, Canada R7A 6A9