ILLUSTRATIONS 



Nest of the Black-Throated Sparrow in 

 Cactus Frontispiece 



Photograph by Wright M. Pierce 



Tracks of a Road- Runner 4 



Photograph by J. Smeaton Chase 



Road-Runners about One-Third Grown 4 



Photograph by Wright M. Pierce 



Road-Runner 21 



Trade Rat's Home in a Rock-Crevice 32 



Ground Plan of the Trade Rat's Nest 34 



An Arroyo of the Desert Mountains — an 

 Ideal Environment for Small Rodents 60 



Flask-Shaped Nests of Cactus Wren in Opun- 

 TLA Cactus - 72 



Photograph by Wright M. Pierce 



Rocky Gorge Environment, Colorado Desert: 

 Washingtonla Palm in Foreground 82 



From a drawing by Carl Eytel 



Antelope Chipmunk Feeding 100 



Photographs by Edwin A. Field 



A Desert Wash, or Dry, Sandy Stream-Bed: 

 The Home of the Le Conte Thrasher, the 

 Kit Fox, and the Coyote 120 



