PLATE 2 



Fig. 3. Eat trap set beside typical sign (faeces) of bushy-tailed wood rat 

 among broken blocks of granite. Photographed at Lyell Canon, 9700 feet, Yosem- 

 ite Park, July 25, 1915. This represents a regular habitat of this rodent and in 

 such places very little sign is discernible even when the wood rats are compara- 

 tively numerous. The persistent musky odor which emanates from the animal 

 gives the best clue to the presence of this species. 



Fig. 4. "House" of Neotoma cinerea cinerea in a crevice between two huge 

 vertical slabs of granite which crowned the highest hill in the vicinity. Photo- 

 graph taken three miles east of Jackass Spring, 7200 feet, Inyo County, October 6, 

 1917. This house was composed almost entirely of dead pinon twigs some of 

 which were three-fourths of an inch in diameter and over a foot long. It was 

 sixteen inches wide, almost as high as Avide, and extended back three or four feet 

 into the crevice. The house was placed nearly eight feet above the base of the 

 rock mass and was used at this time merely as a temporary refuge. 



[72] 



