1. Department of Natural Resource Sciences, McGill University, Macdonald Campus, Ste-Anne-de-Bellevue, quebec, H9X 3V9 (Canada) stephanie.boucher@mcgill.ca
2. Research Institute for Nature and Forest (INBO), Herman Teirlinckgebouw, Havenlaan 88 bus 73, B-1000 Brussels (Belgium); and Entomology Unit, Royal Belgian Institute for Natural Sciences (RBINS), Vautierstraat 29, B-1000 Brussels (Belgium)