====================================================================== | Number | Per cent | | of total --------------------------------------------------+--------+---------- Perognathus fallax pallidus | 16 | 16.7 Dipodomys merriami merriami | 3 | 3.1 Dipodomys panamintinus mohavensis | 36 | 37.5 Peromyscus truei montipinoris | 22 | 22.9 Peromyscus maniculatus sonoriensis | 12 | 12.5 Neotoma lepida lepida | 2 | 2.1 Neotoma fuscipes simplex | 2 | 2.1 Onychomys torridus pulcher | 3 | 3.1 --------------------------------------------------+--------+---------- PLATE 1 [Illustration: FIG. 1. View of typical coastal sage scrub association, showing in foreground white sage, and coastal sagebrush. The adobe banks beyond are grown mainly to white sage. Small mammals are abundant in this association, with _Dipodomys agilis_, _Perognathus fallax_, and _Sylvilagus audubonii_ being characteristic of the area. Photo March 25, 1952, at mouth of San Antonio Canyon, 1800 feet elevation.] [Illustration: 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 [Illustration: 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.] [Illustration: 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 [Illustration: 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.] [Illustration: FIG. 2. View of a pinyon pine woodland. This habitat constitutes the upper part of the pinyon-juniper association, and is the habitat of _Neotoma fuscipes simplex_, _Peromyscus truei montipinoris_, and _Eutamias merriami merriami_. Photo April 27, 1952, in Sheep Creek Canyon, 5500 feet elevation.] PLATE 4