R. Terry Chesser,^1,2,3 Richard C. Banks,¹ F. Keith Barker,⁴ Carla Cicero,⁵ Jon L. Dunn,⁶ Andrew W. Kratter,⁷ Irby J. Lovette,⁸ Pamela C. Rasmussen,⁹ J. V. Remsen Jr.,¹⁰ James D. Rising,¹¹ Douglas F. Stotz,¹² Kevin Winker<sup>13

1</sup>U.S. Geological Survey, Patuxent Wildlife Research Center, National Museum of Natural History, MRC-111, P.O. Box 37012, Washington, D.C. 20013, USA
²The authors are members of the American Ornithologists' Union's Committee on Classification and Nomenclature—North and Middle America, listed alphabetically after the Chairman.
³E-mail: chessert@si.edu
⁴Bell Museum of Natural History, University of Minnesota, St. Paul, Minnesota 55108, USA
⁵Museum of Vertebrate Zoology, 3101 Valley Life Sciences Building, University of California,Brkeley, California 94720, USA
⁶52 Nevada Street, Bishop, California 93514, USA
⁷Florida Museum of Natural History, P.O. Box 117800, University of Florida, Gainesville, Florida 32611, USA
⁸Cornell Laboratory of Ornithology, 159 Sapsucker Woods Road, Ithaca, New York 14850, USA
⁹Michigan State University Museum and Department of Zoology, West Circle Drive, East Lansing, Michigan 48824, USA
¹⁰Museum of Natural Science, Louisiana State University, Foster Hall 119, Baton Rouge, Louisiana 70803, USA
¹¹Department of Ecology and Evolutionary Biology, Ramsay Wright Zoological Labs, University of Toronto, Toronto, Ontario MSS 3G5, Canada
¹²Environment, Culture and Conservation, Field Museum of Natural History, 1400 S. Lake Shore Drive, Chicago, Illinois 60605, USA
¹³University of Alaska Museum, 907 Yukon Drive, Fairbanks, Alaska 99775, USA