M.F. Smith 1977 JOURNAL Foothills of Sierra Nevada, Great Range, Panamint Valley Mar.26 Left Berkeley at 7:30 am after picking up John Calle and Don Straney, Mileage 36443. The purpose of this trip is to collect Peromyscus californicus to fill in the geographic areas that I haven't yet sampled electrophoretically. Don is interested in collecting the Peromyscus near Trona & Darwin Falls that was previously thought to be intermediate between P. cinitus and P. eremicus, but which he now suspects may be P. truei. Drove east towards Yosemite on 120 to 49 at Chinese Camp, south on 49 looking at habitat, saw some possible areas just N of the county line in Tuolumne Co., and just N of Bear Valley. Drove all the way to El Portal looking for possible locality that had been reported as "near El Portal", but didn't see any accessible chaparral along the Merced River canyon, although some hillsides were covered with it higher up. Decided to go all the way into Yosemite and stake out a campsite. Had lunch at ~1:30 pm, then drove back out to set traps. Set 120 folding Sherman's 13.6 mi NW of Mariposa (counting from intersection of Hwy 140 and 49 in Mariposa, or 1.5 mi NW of historical marker in Bear Valley. These traps were in chemise, ceanothus, + manzanita.