1 Department of Zoology, Faculty of Science, Charles University, Vinicˇná 7, CZ-128 00, Praha 2, Czech Republic. Electronic address: jprokop@natur.cuni.cz.
2 Division of Entomology, Natural History Museum, and Department of Ecology & Evolutionary Biology, 1501 Crestline Drive Suite 140, University of Kansas, Lawrence, KS 66045, USA; Division of Invertebrate Zoology, American Museum of Natural History, Central Park West at 79th Street, New York, NY 10024-5192, USA.