Royce E. Ballinger (Ph.D. Texas A&M) Professor Emeritus, University of Nebraska-Lincoln. Over 130 publications focusing on the demography and ecology of lizards. Served in several administrative positions including Director of Biological Sciences, UNL. John D. Lynch (Ph.D. Kansas), Professor and Curator, National University of Colombia, Bogota. Colombia. Faculty member at Nebraska for 27 years and relocated to Bogota in 1997 and elected to the National Academy of Sciences of Colombia in 1998. Over 500 publications focusing on the systematics of neotropical frogs. Geoffrey R. Smith (Ph.D. Nebraska), Associate Professor and Chisholm Chair of Natural Sciences at Denison University, Granville, Ohio. Over 150 publications emphasizing the ecology of amphibians and reptiles.