Fig. 2. View of a main channel in San Antonio Wash on Pacific slope. The wash is a distinct habitat in the coastal sage scrub association, and is the preferred habitat of Peromyscus eremicus fraterculus and Neotoma lepida intermedia. These rodents find shelter in the piles of boulders. Photo February 2, 1952, in San Antonio Wash, at 1700 feet elevation.
PLATE 2
Fig. 1. Southern oak woodland association. The open leaf-strewn floor of the woodland lacks shelter for ground-dwelling rodents and the population of rodents is small. Peromyscus boylii rowleyi is the commonest rodent. Photo March 10, 1952, in Evey Canyon, 2700 feet elevation.
Fig. 2. Yellow pine forest association, composed largely of yellow pines, white fir, and black oak. Photo April 27, 1952, at Big Pines, 6800 ft. elevation.
PLATE 3
Fig. 1. View of the sagebrush scrub association showing a nearly pure stand of basin sagebrush. Dipodomys agilis perplexus and Reithrodontomys megalotis longicaudus occur in this association, and Peromyscus truei montipinoris is present where this association merges with the pinyon-juniper association. Photo April 27, 1952, in Swarthout Valley, 6200 feet elevation.
