NATURALIST'S GUIDE TO THE AMERICAS PREPARED BY THE COMMITTEE on the PRESERVATION of NATURAL CONDITIONS of THE ECOLOGICAL SOCIETY OF AMERICA with assistance from numerous organizations and individuals ASSEMBLED AND EDITED BY THE CHAIRMAN VICTOR E. SHELFORD University of Illinois and Illinois State Natural History Survey PUBLICATION EDITOR FORREST SHREVE Desert Laboratory of the Carnegie Institution ASSOCIATES AND SPECIAL EDITORS E. LUCY BRAUN University of Cincinnati Botany Assembled and Edited parts on National Parks and Monuments of the United States LEE R. DICE Museum of Zoology, University of Michigan Mammals LYNDS JONES Oberlin College Birds CLARENCE F. KORSTIAN Appalachian Forest Experiment Station Forestry Assembled ana Edited parts on National Forests of the United States ROBERT B. MILLER I'llinois Natural History Survey Forestry HELEN T. GAIGE Museum of Zoology, University of Michigan Reptiles FRANK C. BAKER Natural History Museum, University of Illinois Zoology BALTIMORE THE WILLIAMS & WILKINS COMPANY 1926 -iii- |