362 University of California Publications in Zoology l VoL - 12 



Eiver and Kangaroo Creek. Most of our summer camps were evi- 

 dently above the level of their range. Nineteen specimens (nos. 

 12812-12822, 13383-13390) were secured at the four localities named 

 above. 



Neotoma cinerea occidentalis Baird 

 "Western Bushy-tailed Wood Rat 



The bushy-tailed wood rat was not common at any of our camps, 

 except that on the North Fork of Coffee Creek. Here Miss Alex- 

 ander found a colony in a deserted cabin and specimens were 

 trapped without any particular difficulty. At Jackson Lake where 

 we found them first we looked for fresh sign in the rock slides at 

 the south and west sides of the lake without success; but there was 

 plenty of old sign, and rat-traps baited with bacon produced seven 

 in all. The altitude at Coffee Creek was rather low for the species, 

 as was also that at Kangaroo Creek, near Scott River. At the 

 latter place, however, we again found them inhabiting an old cabin 

 and this time in company with their round-tailed kin. 



At Castle Lake we did some intensive trapping for what seemed 

 to be the only individual at the Lake. "We set a quantity of traps 

 in rock slides at the end of the lake with no success until one morn- 

 ing Miss Alexander found a hind foot left in one of her traps. 

 Since this proved the presence of the species we kept up the trap- 

 ping and on our last morning she captured the rest of the rat — 

 unmistakably the same animal, for he was minus a hind foot. This 

 we had saved and so, by fastening it in its proper place, were 

 able to preserve a complete specimen. 



Twenty examples were secured (nos. 13363-13382), from the 

 following localities : Jackson Lake, North Fork of Coffee Creek, head 

 of Grizzly Creek, Kangaroo Creek, and Castle Lake. 



Evotomys obscurus Merriam 

 Dusky Red-backed Mouse 

 Owing to lack of material for comparison it is rather difficult to 

 determine the systematic status of the two specimens of Evotomys 

 which we secured, one rather young male from Jackson Lake and one 

 adult female from Castle Lake; but the two points in which these 

 incline most strongly to the above-named species are the dull color 



