LLUSTRATIONS. 



PLATES. 



Page. 

 I. Fig. 1. — Meadow mouse (Microtus pennsylvanicus) . Fig. 2. — Pine 



mouse (Microtus pinetorum scalopsoides) 16 



II. Roots of wild morning-glory stored by meadow mice 16 



III. Fig. 1. — Young apple tree eaten by pine mice. Fig. 2. — Young apple 



tree eaten by meadow mice 24 



IV. A neglected young orchard in winter 24 



V. Fig. 1. — Pear tree injured by meadow mice. Fig. 2. — Apple tree 



injured by meadow mice 24 



VI. Fig. 1. — Low-headed apple tree in a Kansas orchard. Fig. 2. — 



Apple tree recovered after injury by mice 28 



VII. Fig. 1. — Apple tree killed by prairie mice. Fig. 2. — Apple tree 



killed by rabbits 28 



VIII. Apple trees girdled by prairie mice (Microtus oclirogaster) 28 



TEXT FIGURES. 



Fig. 1. Nests, burrows, and trails of Microtus pennsylvanicus 16 



2. Field mouse caught in baited guillotine trap 54 



3. Field mouse caught in unbailed guillotine trap 54 



4 



