Examinations of feces showed that in the period from 1948 to 1952, while populations of jack rabbits were low in the Mojave Desert, the coyotes had fed extensively on smaller mammals such as kangaroo rats, and to some extent on fruit. By contrasting the present food habits of coyotes on the desert and coastal slopes of the mountains support is afforded for Errington's (1937:243) statement that predation is "a by-product of population." On the desert slope, with low populations of rabbits, the coyotes have turned to lesser species of prey; while on the Pacific slope, where populations of rabbits were high, the rabbits made up the major portion of the coyote's diet. On the desert slope, remains of the following food items were identified from coyote feces: kangaroo rats, mule deer, jack rabbits, passerine bird, manzanita and juniper fruit, beetles, grapes and apples. Near Valyermo, coyote feces were composed mostly of apples from nearby orchards. A female coyote killed below Grandview Canyon had its stomach and intestines stuffed with apples in large chunks. In the juniper belt, berries of juniper were often eaten by coyotes. The three specimens of coyotes from the desert slope are clearly referable to the desert race _C. l. mearnsi_, both with regard to cranial and pelage characteristics. Although I collected no specimens from Cajon Pass or the passes at the west end of the range, it is in these places that intergradation might be expected to occur between the desert race _C. l. mearnsi_ and the coastal and valley subspecies _C. l. ochropus_, as the higher parts of the San Gabriels seem to constitute a barrier to coyotes. A subadult female coyote taken in the Joshua tree belt near Graham Canyon weighed 20.8 pounds. _Specimens examined._--Los Angeles County: 6 mi. E and 2 mi. S Llano, 3600 ft., 3 (2 PC). =Vulpes macrotis arsipus= Elliot Kit Fox The kit fox barely enters the area under consideration. In the Joshua tree belt, below about 3500 feet elevation, tracks were most often noted in washes and on the adjacent sandy ground. The highest place where tracks were seen was a small sandy draw below the mouth of Graham Canyon at an altitude of roughly 3900 feet. In the Joshua tree belt many old burrows were found but none was occupied. I believe these foxes are returning to this area where once they were common. In the winter of 1948 no sign of kit foxes was found, although intensive field work was done in the Joshua tree belt in the Mescal Canyon area. In December of 1951, in the same locality, sign was obvious and an individual was trapped below Grandview Canyon at 3500 feet elevation. Possibly since the use of poison for carnivores has been discontinued in this district the foxes are repopulating the area. The one specimen taken, a sub-adult female, weighed two pounds and fourteen ounces. _Specimen examined._--Los Angeles Co.: 6 mi. E & 1 mi. S Llano, 3500 ft., 1. =Urocyon cinereoargenteus californicus= Mearns