80 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4th Ser. 



At Stewart's Springs we found quite a number of rodents, 

 but did not succeed in securing as many species as we had 

 hoped. Around the cabin were the Western Bushy-tailed Wood 

 Rat, Neotoma cinereus occidentalis, apparently living in 

 friendly community with the Sierra Golden-mantled Ground 

 Squirrel, Callospermophilus chrysodeirus chrysodeirus, as we 

 caught these two animals in the same spots, on one occasion at 

 the mouth of a hole among the rocks, and on another in a trap 

 kept set under the edge of a bath-house by the stream. Gam- 

 bel's White-footed Mouse, Peromyscus maniculatus gambeli 

 was the more numerous of the two species of the genus Pero- 

 myscus found here, the other being Gilbert's White-footed 

 Mouse, Peromyscus truci gilberti. The Klamath Chipmunk, 

 Eutamias amoonus amccnus, and Allen's Chipmunk, Entamias 

 senex, were both well represented here. The Sierra Chickaree, 

 Sciurus douglasi albolimbatns was occasionally met with. 



Just below the cabin was a dark, damp spot on the bank of 

 the stream, that was full of holes among tree roots and ap- 

 peared to be an ideal place for shrews, but persistent trapping 

 there brought no results and no shrews were obtained any- 

 where. 



As the owners of these springs wished to put the place in 

 order for summer occupation, we returned to Weed, on May 23, 

 to repack and make a new start. 



We had been given to understand that we would find accom- 

 modation at "Big Springs" (Mayten), but upon reaching that 

 place on Monday, May 24, we found this to be an error, and 

 having no camping outfit with us we made a circuit around 

 Shasta Valley to look for a hospitable location. 



The object in going to this locality was to examine the lava 

 and juniper country in the vicinity, which is here covered also 

 with sage brush, on the one side and the meadows around the 

 Big Springs laguna on the other, as this seemed to be an invit- 

 ing combination for the Upper Sonoran Zone. 



Its appearance, however, probably belies it, for the Alexan- 

 der Expedition in 1911 remained there only two days, appar- 

 ently not deeming the prospect sufficiently alluring for further 

 effort. The road from Weed to Big Springs passes alongside 

 or through the lava, sage and juniper for some miles, and, as 



