Mayhew 1960 June 12 Journal 53. Colorado Desert, Riverside Co., Calif. Species area ? f Total Urosaurus graciosa slamis 4 4-1 8 Palm Springs 1 1 Total 9 Uta stansburiana Des. Center 2 2 Old Dale 1 1 Total 3 Phrynosoma platyrhinos Dale Lake 3 1 4 Total 4 Sauromalus obesus Old Dale 9 3 12 Total 12 Thus, 191 animals of 14 species were cought on the trip. Since 1 had to be thrown away & 1 escaped, 186 animals were able to be used. July 15 Blue Ridge Campgd., San Gabriel Mts., Los Angeles Co., Calif. Thirteen members of the zoology 113 B class from the Santa Barbara campus of Univ. of Calif., Dr. Mary Erickson & I left the Santa Barbara campus at 15:10 and drove up to this location for the night. We arrived about 1930. We set out mammal traps (12), then ate & went to bed, after looking at the view of the great Los Angeles basin from up there. July 16 We arose at 04:30 & checked the traps. Only 1 Peromyscus maniculatus was caught. We looked at birds after breakfast until 0800. Species seen were: Cooper's hawk Pine Siskin