8 ILLUSTRATIOJ^S 



Figure 19. Meadow Mouse caught in a guillotine trap. (From U. S. 



Department of Agriculture.) 79 



FiGtiBE 20. Map showing locality records of 



1. Meadow Mouse (Microtus pennsylvaniciis pennsylvanicus) . 



2. Prairie Meadow Mouse {Microtus ochrogaster ochrogaster) . 



3. Woodland Vole {Microtus pinetorunv nemoralis) 81 



Figures 21 and 22. Apple trees five inches in diameter girdled by Prairie 



Mice {Microtus ochrogaster). The trees were saved by heaping 

 up soil about the trunks to cover the injury. (From U. S. De- 

 partment of Agriculture, Bureau of Biological Survey.) 88 



Figure 23. Apple tree killed by Prairie Mice. (From U. S. Department of 

 Agriculture, Bureau of Biological Survey.) 89 



Figure 24. Root and trunk of apple tree from Laurel, Maryland, gnawed 

 by Pine Mice. (U. S. Department of Agriculture, Bureau of 

 Biological Survey. ) 92 



Figure 25. Pine tree killed by Pine Mice. (From U. S. Department of 

 Agriculture, Bureau of Biological Survey.) 94 



Figure 26. The Muskrat. (From U. S. Department of Agriculture, 

 Bureau of Biological Survey.) 98 



Figure 27. Map showing locality records of 



1. Goss's Lemming Mouse {Synaptomys cooperi gossii). 



2. Prairie Harvest Mouse {Reithrodontoviys megalotis dychei.) . .107 



Figure 28. Faces of Pocket Gophers, showing pouches and incisors. 



(From U. S. Department of Agriculture.) 109 



Figure 29. Apricot tree killed by Pocket Gopher. (From U. S. Depart- 

 ment of Agriculture.) 112 



Figure 30. A section of the Apricot tree shown in the preceding view. 

 The injury was under ground. (From U. S. Department of 

 Agriculture. ) 113 



Figure 31. Root of Apple tree gnawed by Pocket Gopher. Root knots 

 prominent. (From U. S. Department of Agriculture.) 114 



Figure 32. Map showing locality records of 



1. White-tailed Jack Rabbit {Lepus townsendi campanius.) 



2. Great Plains Jack Rabbit {Lepus californicus nnelanotis.) 132 



Figure 33. Young Cottontail at about the time of leaving nest. Photo 



from life by Frank C. Pellett 134 



Figure 34. Cottontail Rabbit in its "Form". (From U. S. Department 



of Agriculture, Bureau of Biological Survey.) 135 



Figure 35. Apple tree killed by Rabbits. (From U. S. Department of 



Agriculture, Bureau of Biological Survey.) 136 



Figure 36. Details of a Wellhouse Rabbit trap. (From U. S. Department 



of Agriculture, Bureau of Biological Survey.) 138 



