POISONOUS DWELLERS OF THE DESERT Popular Series No. 3 Southwest Parks and Monuments Association [Illustration: _Deserts of the Southwest are not desolate expanses of sand as many persons believe. This photograph, showing vegetation in Organ Pipe Cactus National Monument, Arizona, is a typical illustration of the variety and density of plant growth in the Sonoran desert area of northwestern Mexico and southwestern Arizona._] POISONOUS DWELLERS OF THE DESERT by NATT N. DODGE TWELFTH EDITION (revised), 1970 Published in co-operation with the National Park Service by the Southwest Parks and Monuments Association in keeping with one of its objectives, to provide accurate and authentic information about the Southwest. [Illustration: Association logo] Southwest Parks and Monuments Association Globe, Arizona (formerly Southwestern Monuments Association) Copyright, 1952, by the Southwestern Monuments Association Box 1562, Gila Pueblo, Globe, Arizona 85501 Published October 21, 1947 Second printing, revised, October, 1948 Third printing, revised, December, 1948 Fourth printing, revised, January, 1952 Fifth printing, June, 1953 Sixth printing, March, 1955 Seventh printing, December, 1957 Eighth printing, revised, January, 1961 Ninth printing, revised, March, 1964 Tenth printing, June, 1966 Eleventh printing, August, 1968 Twelfth printing, revised, August, 1970 Printed in the United States of America by PABSCO Printing and Business Supply Co. Globe, Arizona CONTENTS