ILLUSTRATIONS 



FIGURE 1. Map showing locality records of 



1. Southern Flying Squirrel (Glaucomys volans volans) 18 



FIGURE 2. Western Fox Squirrels a few days after birth. Photo from 

 life by Frank C. Pellett. From "Our Backdoor Neighbors.". 19 



FIGURE 3. Western Fox Squirrels ten days after the previous picture w'as 

 taken. Photo from life by Frank C. Pellett. From "Our Back- 

 door Neighbors." 21 



FIGURE 4. Map showing locality records of 



1. Northern Gray Squirrel (Stciurus carolinensis leucotis). 



2. Southern Red Squirrel (Sciurus hudsonicus loquax} 24 



FIGURE 5. Map showing locality records of 



1. Gray Chipmunk (Tamias striatus griseus) 28 



FIGURES 6 AND 7. The Plains Prairie-Dog (Cynomys ludovicianus) . 



(From U. S. Department of Agriculture.) 41 



FIGURE 8. The Plains Prairie-Dog (Cynomys ludovicianus) . 



(From U. S. Department of Agriculture.) 43 



FIGURE 9. Plan of a iWoodchuck burrow. (From Field Museum of 

 Natural History.) 47 



FIGURE 10. Pet Beavers. (From U. S. Department of Agriculture.) . 51 



FIGURE 11. Northern White-footed Mouse (left). House Mouse (center). 

 Prairie White-footed Mouse (right). Photo from life by Frank 

 C. Pellett ." 53 



FIGURE 12. The Brown Rat. (From U. S. Department of Agriculture, 

 Bureau of Biological Survey.) 54 



FIGURE 13. Guillotine trap made entirely of metal. (From U. S. De- 

 partment of Agriculture, Bureau of Biological Survey.) 62 



FIGURE 14. Guillotine trap with wooden base and trigger plate. (From 



U. S. Department of Agriculture, Bureau of Biological Survey.) 



63 



FIGURE 15. Barrel trap: 1, with stiff paper cover; 2, with hinged cover; 

 a stop; & baits. (From U. S. Department of Agriculture, Bureau 

 of Biological Survey. ) 64 



FIGURE 16. Map showing locality records of 



1. Northern White-footed Mouse (Peromyscus leucopus novebora- 

 censis). 



2. Prairie White-footed Mouse (Peromyscus maniculatus Txiirdi). 71 

 FIGURE 17. Field-Mouse skulls taken from pellets found under owl roost 



in Smithsonian tower, Washington, D. C. (From U. S. Depart- 

 ment Agriculture, Bureau of Biological Survey.) 72 



FIGURE 18. Prairie Harvest Mouse. Photo from life by Frank C. Pellett. 



. 77 



