Mayhew 1959 Journal 71. July 15 Lovejoy Buttes, Los Angeles Co., Calif. today than we have seen on all our collecting trips combined this past year. In addition, we caught more of them today (24) than we presently have in our entire collection for reproduction studies on this species. Apparently, in the past we have been working at the very edge of the distribution of S. magister in this region. Now we have moved farther out into the occupied area. No Sceloporus occidentalis were seen today until we returned to our old collecting areas late this afternoon. Apparently these two species overlap in distribution in a rather narrow band in this region. We captured a total of 25 animals today, divided as follows: Sceloporus magister - 24 (5ad σ, 5ad. ♀, 4 imm. α, 5 imm. ♀, 5 ?) Sceloporus occidentalis - 1 (ad. ♀) In addition to collecting in the immediate vicinity of Lovejoy Buttes, we captured animals on or near Saddleback Buttes (18 miles east of Landcaster). A road goes between Pinto & Rocky Buttes, and spirits Alpine Buttes, but no specimens were seen or collected near these outcrops. We returned toward UCR at 1915, reaching there at 2025, after a trip of 224 miles. (Sunset was at 1901).