March, 1904. Mammals of Southern California — Elliot. 293 



species in Morongo Valley was found on the sides of canons in 

 granite sand, but on the Mohave Desert they frequented level 

 plains or valleys amid tree yuccas or about the dry washes of 

 stream beds." 



Peromyscus leucopus deserticola. 



Peromyscus 1. deserticola Mearns, Bull. Am. Mus. Xat. Hist., 

 1890, p. 285. Elliot, Syn. N. Am. Mamm., 1901, p. 125. 



112 Examples: 5 Palm Springs, 2 Whitewater, 12 Morongo 

 Pass, 3 Banning, 2 Warren's Well, 1 Burns Cation, 1 Victor, 

 7 Oro Grande, 7 Coal Kilns, 17 Hannopee Canon, 1 Wild Rose 

 Springs, Panamint Mountains, 13 Hot Springs, 3 Monache 

 Meadows, 1 Whitney Meadows, 1 Whitney Creek, 8 Big Cotton- 

 wood Meadows, 2 Coso Mountains, 14 Inyo Mountains, 12 Lone 

 Pine. 



"An abundant race from the lowest part of the desert to 

 the highest parts of the Sierras where it was secured at timber- 

 line. On the desert this race occurs usually only about 

 streams and wet meadows." 



I refer all the specimens in this series to the present sub- 

 species after critical examination and comparison with topotypes. 

 It appears to range as widely as does its darker relative, P. tluir- 

 bcri, in Lower California, Mexico, and in the extreme southern 

 part of California, affecting the hot deserts and cold mountain 

 summits, apparently indifferent to temperature, bearing its 

 extremes equally well. Some old individuals have an entire 

 rich ochraceous pelage, very conspicuous among the paler 

 specimens, but these are not confined to one localitv, but come 

 from the desert at Palm Springs, on the Morongo Pass at Ban- 

 ning, and in the high mountains at Hot Springs in the Pana- 

 mints, and this dress cannot be considered seasonal, for some 

 were taken in February, others in July, and therefore probably 

 it is due to age. As is natural in a series as large as this there 

 is considerable variation in the coloring of the specimens, and 

 some approach in appearance to P. t. gambeli, but none is as 

 dark as that mouse. It is a pale, widely dispersed, somewhat 

 variable form, but possessing characteristics that cause it to be 

 fairly recognizable at almost all ages. 



Peromyscus parasiticus. 



Peromyscus parasiticus Elliot, Pub. Field Columb. Mus., 111, 

 1903, p. 244. Zoology. 



