1. (MAS, MAM) Systematic Entomology Laboratory, Beltsville Agriculture Research Center, Agricultural Research Service, U.S. Department of Agriculture, c/o National Museum Natural History, MRC 168, Smithsonian Institution, P.O. Box 37012, Washington, District of Columbia, 20013-7012, U.S.A. (e-mail: )
2. (NEH) Aquatic Ecology and Invasive Species Branch, Environmental Laboratory, U.S. Army Engineer Research and Development Center, Vicksburg, Mississippi, 39180, U.S.A. (email: )
3. (EPR) Museo Nacional de Costa Rica, San Jose, Costa Rica (email: )
4. (SJS, MLL) Systematic Entomology Laboratory, Agricultural Research Service, U.S. Department of Agriculture, Beltsville, Maryland, 20705 U.S.A. (e-mail: (SJS)
5. (MLL) )
6. (DHJ, WH) Department of Biology, University of Pennsylvania, Philadelphia, Pennsylvania, 29104, U.S.A. (email: )