LLUSTRATIONS. 



PLATES. 



Page. 

 Plate I. Wolf den near Big Piney, Wyo. Position of den is marked by 



a cross ( + ). Fig. 1. — Distant vie^Y. Fig. 2. — Near view 6 



II. Entrance to the wolf den shown in Plate I. Fig. 1. — Opening 

 to the den. Fig. 2. — Nine wolf pups in front of the den. 



April 8, 1906 ^ 6 



III. Fig. 1. — Distant view of west slope of Wind River Mountains. 

 The high peaks are 30 miles away. Two wolf dens in the 

 foothills, marked by a cross ( + ), 8 miles from the camera. 

 Fig. 2.— East slope of Wind River Mountains, near Torrey 

 Lake. Nine wolf dens along south slope of ridge between 

 crosses 8 



TEXT FIGURES. 



Fig. 1. Present distribution of wolves in the United States (map) 7 



2. Location of 20 breeding dens in western Wyoming (map) 9 



3. Method of fastening wolf trap to triangular or square stone 27 



4. Method of fastening wolf trap to long oval stone 28 



5. Iron stakes for wolf trap, with and without swivel 29 



. 4 



