l8 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 69 



as well as foreigners, were excluded. The region tempted native rub- 

 ber gatherers inhabiting adjoining territory, who informed me that a 

 spear set in the middle of trails was recognized as a dead line beyond 

 which they passed at their peril. Exploration of mountain ranges 

 between the Canal Zone and the lofty Volcan de Chiriqui would add 

 much to our knowledge of the distribution of many mountain 

 mammals now known only from the extreme eastern or western 

 parts of the republic. 



ACKNOWLEDGMENTS 



While engaged in field operations in Panama material assistance 

 was received from many persons, some of whom it is impracticable 

 to mention by name, but to all I extend most sincere thanks. Special 

 acknowledgments are due first to Colonel (now Major-General) 

 George W. Goethals, who, as Chairman and Chief Engineer of the 

 Isthmian Canal Commission, furnished transportation, quarters and 

 other facilities, and whose unfailing kindness and courtesy contri- 

 buted to the pleasure as well as the success of work in the Canal 

 Zone. Other officers to whom special credit should be given are the 

 division engineers, the late Colonel D. D. Gailliard, Colonel (now 

 Major-General) William L. Sibert, and to Chief Quartermaster, 

 Colonel (now Major-General) C. A. Devol; also District Quarter- 

 masters Robert M. Gamble, James H. K. Humphrey and Walter G. 

 Ross. Appreciation of the aid of my field assistants, Adan Lizano 

 and George G. Scott, as well as various officials of the Darien Gold 

 Mining Company, has already been expressed in these pages, but I 

 wish to emphasize it again here. 



In order to complete the account of the mammals of the region, 

 those of western Panama have been included in the report. For the 

 unrestricted use of material and other favors my thanks are due to 

 the officials of the Museum of Comparative Zoology and American 

 Museum of Natural History, especially Mr. Outram Bangs and 

 Dr. J. A. Allen, under whose direction at the respective institutions 

 the only large collections available from the section named have 

 been brought together. For the loan of certain specimens I am also 

 indebted to Mr. Wilfred H. Osgood of the Field Museum of Natural 

 History. Most of the names of plants used in zone lists have been 

 kindly furnished by Professor Henry Pittier, who had charge of the 

 botanical section of the survey and is the authority on the flowering 

 plants of the region. For a list of characteristic grasses I am under 

 obligations to Professor A. S. Hitchcock. The heads of bats figured 

 were drawn under my direction bv Mrs. Ruth Collette Moore. 



