94 NORTH A:MERICAN FAl'NA. [no. 16. 



Peromyscus gambeli (Baird). Common Wliite-footed Mouse. 



Common on all. or nearly all, parts of the mountain from Sisson up 

 to and possibly a little above extreme timbcrline. One hundred speci- 

 mens Avere collected. 



lu choosing their homes these mice are easily suited, for they seem 

 e(pially contented among the dense vegetation in damj) parts of the 

 bottoms of canyons and among the bare lava rocks and pumice soil ot 

 the driest timberline slopes. tSome were caught also in the heather 

 meadows bordering the little streams in the Hudsoniau zone. At 

 Sisson Iv. T. Fisher found them rather rare except in damp woods 

 along Cold Creek, where he caught a number under roots and stumps 

 close to the water. 



Peromyscus boyli (l>aird). 



Exceedingly rare, or else of such peculiar habits that it escaped 

 observation. Only a single specimen was obtained on Shasta, it was 

 caught at the extreme upper limit of the Canadian zone (alt. 7,800 feet) 

 on Squaw Creek, August 9, by Walter K. Fisher. Others were secured 

 at Fall River Lake, iu the Transition zone, southeast of the base of the 

 mountain. 



Peromyscus truei (Shf.). Big-eared Mouse. 



Collected in Little Shasta Valley by Walter K. Fisher, who found it 

 living among bushes of Ceanothns cKneatus. 



Neotoma fuscipes Baird. Round-tail Wood Rat. 



Not found on Shasta, but common in some of the low valleys at its 

 base. Their characteristic stick houses were seen in the juniper forest 

 at the southern end of Shasta Valley, in the chaparral near Gazelle, 

 and in several places in the Scott Mountains (Bailey), lu Little Shasta 

 Valley one was collected September 19 (Osgood). 



Neotoma cinerea Ord. Bushy-tail Wood Rat. 



Rather scarce. Only four specimens were obtained — two in Mud 

 Creek Canyon near the mouth of Clear Creek, and two high up on 

 Squaw Creek (alt. 8,800 feet). Of those caught in Mud Creek Canyon, 

 one was trapped at the end of an old log, the other at the entrance to 

 an aplodontia burrow. Shasta abounds in the kinds of ledges and 

 cliffs usually inhabited V)y this si)ecies, but, except at rare intervals, no 

 traces of the animals were found- 



Microtus californicus (Peale). California \'ole. 



Not obtained by us except in Shasta Valley, where six si)ecimens 

 were se(;ured in Sei)teinber by W. U. Osgood and R. T. Fisher. Their 

 runways were found in very wet places in the tules at Big Spring, in 

 Shasta N'alley, and along Little Shasta Creek. Walter K. Fisher 

 secured specimens along Shasta River, northeast of Edgewood. 



