B B ireau of Entomology. U S Dent of Agriculture 



Plate VI. 



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Cages for Hibernation Experiments in Texas, 1906-7. 



Pig. I.— Dallas. Tex., cage on flat, black-waxy land. Fig. 2. —Calvert, Tex., cage on slightly 

 sloping, sandy land in post-oak region. Fig. 3.— Victoria, Tex., cage on sandy-loam slope 

 between bottom and upland. (Original.) 



