2 U.S. NATIONAL MUSEUM BULLETIN 275 



History), London; and Dr. Francis Petter, Curator of Mammals, 

 Museum National d'Histoire Naturelle, Paris. 



I am particularly indebted to Dr. Henry W. Setzer, Associate 

 Curator, Division of Mammals, United States National Museum, 

 Smithsonian Institution, for bis efforts in arranging for my participa- 

 tion in the Libyan project, his untiring criticism of the manuscript, 

 and for his continual encouragement and support of this research. 



To Professor Stephen D. Durrant, Department of Zoology and 

 Entomology, University of Utah, and to Dr. Charles O. Handley, Jr., 

 Curator in Charge, Division of Mammals, United States National 

 Museum, I extend my deepest gratitude for their helpful suggestions 

 aid critical reading of the manuscript. 



I would like also to acknowledge the time and efforts of the follow- 

 ing staff members of the Department of Zoology and Entomology, 

 University of Utah: Drs. George F. Edmunds, Seville Flowers, 

 Kimball Harper, and Harold F. Hirth. 



To my wife Sherri, I am especially grateful for her understanding 

 patience and constant encouragement during the preparation of this 

 work, for typing the preliminary and final manuscript, and for the 

 preparation of the illustrations which appear in the text. 



Field work in Libya in 1961 and 1962 was supported by Grant 

 DA-MD-49-193-62-G35 awarded to the Smithsonian Institution by 

 the U.S. Army Medical Research and Development Command, Office 

 of the Surgeon General. 



I am most grateful to the Division of Education and Training, 

 Smithsonian Institution, for a Predoctoral Internship in 1965-1966 

 which enabled me to conduct the research necessary for the prepara- 

 tion of this publication. 



The statistical computations were performed on a Mathatron-Model 

 8-48S in the Natural History Building, United States National 

 Museum, Smithsonian Institution. 



An essential portion of this research was submitted as a thesis in 

 partial fulfillment of the requirements for the degree of Doctor of 

 Philosophy at the University of Utah. 



