214 JJnivcrsity of California Publicatio)is in Zoology. [Vol. 7 



ratios of the type, a female, approach the tabulated ratios of the 

 females of our series. 



External Measurements of Citellm oregonus From the Pine Forest 

 Mountains, Humboldt County', Nevada. 



For method of taking measurements, see Introduction. 

 All dimensions are in millimeters. 



See C. H. Merriam, 1898, p. 69. 



Juvenals are in coloration practically small counterparts of 

 their parents, though of course having very soft, silky hair. They 

 may present somewhat more of a suffusion of huffy tawny on the 

 nose, and do seem to be a little more dappled than the adults. 

 The dappling is very fine, however, and is not at all comparable 

 to that of Citellus foicnsendi. 



Distribution. — Si)ecimens were secured as follows : near head 

 of Big Creek (altitude 8500 feet), 5; Big Creek (6000 feet), 2; 

 Alder Creek (7000 feet), 4; head of Leonard Creek (8500 feet), 

 1. The distribution of the species is Upper Sonoran( ?) and Tran- 

 sition, although at the higher altitudes the animals are found only" 

 in open, sage-covered meadows. Our records extend tlie known 

 range of the species considerably to the south and east. 



