PLATE 3o 



a. Pile of 484 white fir cones gathered by the junior author from an area on the 

 forest floor 50 by 50 feet, where they had been severally ' ' cached " by a Sierra Chickaree. 

 Photograph taken in Aspen Valley, October 18, 1915. 



b. Twig-tips of lodgepole pine to the number of over 350 cut down by a Sierra 

 Chickaree from a single tree. Photographed near Porcupine Flat, June 29, 1915. Por 

 general discuf^sion, see text, pp. 206, 210. 



70GJ 



