Without the extraordinary efforts of the late Zeno Payne Metcalf and Virginia Wade Burnside (his long-time assistant at North Carolina State University, Raleigh) and Stuart H. McKamey (see below), the resources presented here would not exist.

For assistance in preparing this product as an online resource, we are deeply indebted to Andrew R. Deans, Katja C. Seltmann, and Matthew J. Yoder (NCSU Insect Museum, Raleigh). Kye S. Hedlund (Department of Computer Science, University of North Carolina at Chapel Hill) and Shirley L. Rodgers (NCSU Libraries, Raleigh) were also helpful during the early stages of digitizing taxonomic and bibliographic data.

The Treehoppers Partnership is likewise grateful to the following project participants and collaborators: Jesse L. Albertson and Daniela M. Takiya (both formerly, University of Illinois, Champaign); Gabriel Simões de Andrade, Universidade Estadual do Oeste do Paraná, Brasil; Pedro A. Alvarez, Colin D. Anderson-Evans, James R. Baker, Robert L. Blinn, Jamison E. Bollinger, Joanna R. Carlson, E. Danielle Dietiker, Kevin V. Donohue, H. Ian Frady, Kelly M. Gates, Joshua C. Gentry, Shannon N. Ivey, Sarah Ling, Emili Duke Mack, Istvan Miko, Daniel W. Mott, Carl W. Nagel, Siobhan O'Neal, D. Ray Nimocks IV, John R. Ouelette, Trang Pham, Emily A. Pickle, David A. Pike, Benjamin A. Rauscher, Ellen M. Reeves, José L. Romero, Jennifer A. Schmidt, Nathan T. Smith, Magda P. Sobanski, P. Sterling Southern, Karen H. Spieler, Jessie L. Taylor, and Loren F. Wilson (all formerly or currently, Department of Entomology, NCSU, Raleigh); Ashley M. Dennison (East Stroudsburg University, Pennsylvania); Pat Brownewell (Brownewell Photography, Elkhart, Indian); Christopher H. Dietrich and Brendan O. Morris (Illinois Natural History Survey and University of Illinois, Champaign); Olivia Evangelista, Albino Morimasa Sakakibara, and the late Padre Jesus S. Moure (Universidade Federal do Paraná, Curitiba-PR, Brazil); Michel Boulard (Muséum National d'Histoire Naturelle, Paris); Reginald B. Cocroft, Robert L. Snyder, and the late Thomas R. Yonke (all currently or formerly, University of Missouri, Columbia); Jason R. Cryan (North Carolina Museum of Natural Sciences, Raleigh); Karolyn Darrow and Robert A. Mathews, Smithsonian Institution, Washington, D.C.; Max F. Day (Commonwealth Scientific and Industrial Research Organization, Canberra, Australia); Kleber Del-Claro (Universidade Federal de Uberlândia, MG, Brazil); Murray J. Fletcher (New South Wales Agricultural Scientific Collections Trust and Orange Agricultural Institute, Orange, New South Wales, Australia); Maria Judite Garcia, Laboratório de Geociências, Universidade Guarulhos, São Paulo, Brasil; Bert Gustafsson (Naturhistoriska Riksmuseet, Stockholm, Sweden); David R Guzman (Entomopixel LLC, Raleigh, North Carolina); David W. Hutchison, San Miguel de Allende, Mexico; Dennis D. Kopp (United States Department of Agriculture, Washington, D.C.); Milan Kozánek, Bratislava, Slovakia; Gernot Kunz (Karl Franzens University of Graz - Institute of Zoology, Graz, Austria); Chung-Ping Lin (Center for Tropical Ecology & Biodiversity, Tunghai University, Taichung, Taiwan); Stuart H. McKamey (Systematic Entomology Laboratory, USDA, c/o National Museum of Natural History, Washington, D.C.); Piotr Naskrecki (Museum of Comparative Zoology, Harvard University, Cambridge, Massachusetts); Nabil A. Nasseri (University of Vermont, Burlington); Kenji Nishida (Escuela de Biología, Universidad de Costa Rica); Robert Oelman (Robert Oelman Nature Photography, Colombia); Mark J. Rothschild (Research Associate, FSCA, Gainesville, Florida); Kelly Swing, Founding Director, Tiputini Biodiversity Station, Ecuador; the late Carlo Vidano (Universitá Deglin Studi, Turin, Italy); the late Thomas K. Wood (University of Delaware, Newark); and Herbert Zettel (Natural History Museum, Vienna, Austria).

Contributors to the sections "Taxa" and "References" include the following teams: Taxa Content Team (L. L. Deitz and M. S. Wallace, team leaders; O. Evangelista, Brendan O. Morris, and M. J. Rothschild); Nomenclatural Database Team (L. L. Deitz and M. S. Wallace, team leaders; K. C. Seltmann; M. J. Yoder; S. H. McKamey; and K. S. Hedlund); and References Database Team (L. L. Deitz and M. S. Wallace, team leaders; P. A. Alvarez; J. R. Baker; J. E. Bollinger; J. R. Carlson; C. H. Dietrich; K. V. Donohue; E. R. Duke; K. M. Gates; J. C. Gentry; E. S. Groesbeck; G. Hall; S. N. Ivey; S. H. McKamey; D. R. Nimocks, IV; J. R. Ouelette; O. Evangelista; E. A. Pickle; D. A. Pike; R. A. Rakitov; B. A. Rauscher; S. L. Rodgers; J. L. Romero; M. P. Sobanski; D. M. Takiya; J. L. Taylor; and J. N. Zahniser).

Copyrights to images and audio recordings belong to the institutions or individuals indicated for each item. None of the copyrighted images or audio recordings may be reproduced, stored, transmitted, or disseminated in form or by any means, electronic or mechanical, including photocopy, recording or any information storage and retrieval system, without permission in writing from the copyright holders. Institutions and organizations that hold copyrights to images include: the Commonwealth Scientific and Industrial Research Organization (images by M. F. Day); The Natural History Museum, London (images by M. S. Wallace); the Natural History Museum, Vienna (images by H. Zettel); the New South Wales Department of Primary Industries, Australia; and the Museum National d'Histoire Naturelle, Paris, France (images by M. S. Wallace).

We thank the College of Agriculture and Life Sciences, North Carolina State University, and the North Carolina Agricultural Research Service for permission to reproduce information and images from the following NCARS technical bulletins: TB225 (Deitz 1975a) "Classification of the higher categories of the New World treehoppers (Homoptera: Membracidae)," TB284 (Deitz and Kopp 1987a) "Bibliography of the Membracoidea (Homoptera: Aetalionidae, Biturritiidae, Membracidae, and Nicomiidae), 1956-1980," TB290 (Deitz 1989a) "Bibliography of the Membracoidea (Homoptera: Aetalionidae, Biturritiidae, Membracidae, and Nicomiidae), 1981-1987," TB293 (Dietrich and Deitz 1991a) "Revision of the Neotropical treehopper tribe Aconophorini (Homoptera: Membracidae)," and TB294 (McKamey and Deitz 1991c) "Revision of the Neotropical treehopper genus Metcalfiella (Homoptera: Membracidae)."

We thank the Entomological Society of America (ESA) for permission to reproduce images from D. D. Kopp and T. R. Yonke's (1979a) "A taxonomic review of the tribe Ceresini (Homoptera: Membracidae)," Miscellaneous Publications of the Entomological Society of America 11(20): 1-98.

This material is based on work supported by the National Science Foundation (Grants DEB-9815867, to L. L. Deitz, Principal Investigator; NSF DEB-9978026 PEET Program, to C. H. Dietrich and L. L. Deitz, Principal Investigators; Infrastructure and technical support, NSF DBI-0847924 to Andrew R. Deans and Brian Wiegmann at the North Carolina State University Insect Collection ), a 2009-2010 East Stroudsburg University of Pennsylvania President's Research Fund Grant, a 2009-2010 Pennsylvania State System of Higher Education FPDC Grant, the NCSU Agricultural Research Service, and the NCSU Libraries.

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Prepared 14 July 2010 (last updated 20 July 2012)