TABLE OF CONTENTS. 



Page. 



Introduction 7 



Previous ornithological work in the Urubamba Valley 9 



Whitely's collections 9 



Kalinowski's collections 10 



Collections of Yale University-National Geographic Society's expeditions. . 11 



Descriptions of collecting stations 12 



Life zones of the Urubamba Valley 26 



Tropical Zone 27 



Subtropical Zone 30 



Temperate Zone 30 



Puna or Paramo Zone 35 



North American migrants 40 



List of species and subspecies described 40 



Distributional list of the 380 species and subspecies of birds known from the 



Urubamba Valley 41 



Index 125 



5 



