Pomona College, Claremont, California 103 



Peroiny.uiis buylci roivlcyi. (Allen.) Rowley White-footed 

 Mouse. No specimens were trapped in the valley. However these 

 mice were found not uncommon at the mouth of Palmers canyon, 

 just four miles north of Claremont, in the dry brush land. Within 

 the canyon they were common and were taken as high as the top 

 of Ontario peak along fallen logs. At Camp Baldy they are very 

 common especially along water courses and fallen logs. Indica- 

 tions are that they ignore zonal limits being taken well down in 

 Lower Sonoran /.one and in high transition and not necessarily 

 near watci". 



Peroiny.u i(s rulifoniicus iusigiiis. Rhoads. Chemisal Mouse. 

 Not common. None were taken in the valley and few in the can- 

 yons. They were not found along waterways but frequently brushy 

 hillsides. This is a large species of mouse and was almost too much 

 for the little "gee whiz" traps to hold. 



Pcromyscits crcmiciis fnilcnuliis. Miller. Dulzura Mouse. 

 Common in the brush land of both valley and foothill, being found 

 in the canyons also. 



Ri'itliroduiitoiiiys meyalolis lougicaiidd. Baird. Long-tailed 

 Har\-est Mouse. Common in valley and foothill. Although par- 

 tial to grassy areas ( I took many in the grassy runways made by 

 meadow mice — Microtus californicus). I found them not uncom- 

 mon in the dry brush land east of Indian Hill. 



Neotomci fu.uipi's microtis. Thomas. Southern Brush Rat. 

 Common from valley to 5,000 feet in the mountains in suitable 

 localities. I took one in the property house at the Greek theatre 

 this June. The large nests are seen \ery commonly in the canyons 

 and hiilsitles. 



Ncoloma inlcniicJiii iiiU'niu'Jiii. Rhoatls. Intermediate Brush 

 Rat. These seems to be a curious reversal of conditions between 

 this and the former species. Whereas this species is supposed to 

 be taken only up to .^,000 feet, I took none bcloiv 3,000, all being 

 taken at 5,000 feet or more along fallen logs near watercourses, 

 and the former species was limiteil more distinctly to the foothills 

 which is not a typical condition. 



Microtus ciilifoniiciis (ciUfuniitus. (Peale.) Calitornia 

 Meadow Mouse. Common in runways through the grass in damp 



