1913] Grinnell-Swarth: Birds and Mammals of Sim Jacinto 337 



Our material from the limited region under consideration 

 hails from the following localities: Garnet Queen Mine, 6000 feet, 

 two specimens (nos. 2056, 2057); Kenworthy, 4500 feet, three 

 (nos. 1S6S. 1871, 1872); Vallevista. 1800 feet, thirteen i nos. 

 2289-2301); Banning, 2200 feel, twenty-five (nos. 1424-1448); 

 Cabezon, 1700 feet, twenty-three (nos. 1333-1338, 1341, 1343- 

 1354, 1524, 9346-9348) ; Snow Creek at 1500 feet, thirteen (nos. 



1513-1517, 1525-1532); Whitewater. 1130 feet, nin< »s. 1518- 



1523, 1533-1535) ; Palm Springs, 450 feet, one (no. 6969) ; Palm 

 Canon at 800 feel, two (nos. 2066, 2067; Palm Canon at 2500 

 feet, one (no. 2065); Dos Palmos Spring, :!•">!>() feel, fen (nos. 

 1948 1957). 



The lirst three localities are on the Pacific side of the moun- 

 tains. The specimens from Garnet Queen Mine were trapped 

 around a loose rock wall serving to retain ;i roadway on an 

 Upper Sonoran chaparral hillside. Those at Kenworthy. also 

 in Upper Sonoran. were taken near crevices in huge boulders sur- 

 rounded by chaparral. In the vicinity of Vallevista the animals 

 were taken along hanks of washes, where they lived in holes in 

 the ground, with no vestiges of houses. 



The remainder of the localities of capture are all on the 

 desert slope of the mountains. The series from Banning, Cabezon, 

 and Snow Creek were trapped along the foothills forming the 

 southern margin of San Gorgonio Pass. Those at Whitewater 

 and Palm Springs were on the floor of the desert about patches 

 of cactus and ereasote hushes. Around Dos Palmos Spring the 

 animals were inhabiting rock piles almosl exclusively; there were 

 no stick houses, only occasional scant accumulations of the 

 shriveled remains of cactus fruits. Zonally, the Banning station 

 is at the lower edge of Upper Sonoran. while all the other desert 

 slope stations are in Lower Sonoran, Palm Springs, and White- 

 water being far down in that zone. 



In studying our series of white-footed w 1 rats we have 



reviewed appurtenant literature for the purpose of finding out 

 what characters have keen thought to lie of service in distinguish- 

 ing intermedia, gilva, and des< rtorum. The features so employed 

 are: General coloration, quality of pelage, general size, relative 

 size of ears, relative length of tail, general size and angularity 



