105 



six square-feet of ground. That burrows of the same kind in 

 the surrounding soil were being used extensively by the shrews, 

 I proved in the manner mentioned above, and by subsequent 

 trapping near the same place. 



Diagram showing burrows used by short-tailed shrews in search- 

 ing for insect food. The burrows occurred in thirty-six square-feet 

 of ground under a chestnut tree in the woods. (Original.) 



In many places the mechanical condition of the soil showed 

 that the animals had turned aside from their well-beaten roads 

 and had worked through the ground without leaving any per- 



