ACKNOWLEDGMENTS XV 
In addition, numerous subprefects, gobernadors, private citizens, foreign 
residents were the donors of many services, large and small 
The Eli Lilly Company of Indianapolis provided a complimentary kit of 
tropical medicines which pretty well cared for our needs on both expeditions. 
Further advice and assistance with health problems were given at Lima by the 
national Instituto Higienico 
To Dr. G. 8. Myers, Stanford University, and to Dr. Carl L. Hubbs and Joe 
Kk. Neel of the University of Michigan, my thanks are due for bibliographical as- 
sistance. I must acknowledge the valued help of Mrs. W. R. Allen in proof- 
reading, and that of Miss Barbara Allen in map-making. 
To Dr. Thomas Barbour of the Museum of Comparative Zoology, and to 
Dr. Robert C. Miller and the late Mr. Howard Walton Clark of the California 
Academy of Sciences thanks are due for the loan of specimens. 
Under the hand of Mrs. Dorothy VanCleave Lincicome the Atkinson draw- 
ings were restored from engraver’s proof, most of the originals having been lost. 
