Hofner, M.S. 1974 Journal 15 September 16 Mi. W. Hawthorne, 5600', Lyon Co., Nevada. 1130 - John and I left L.A. - arrived Lee Vining ~ 1800. We drove over California Hwy 167 and took the turnoff to Larkin (dry) Lake. We had planned to trap near Alkali dry lake, but the road was impassable so we drove over dirt road northealy towards Aurora, Nevada. Sunset was ~ 2000. Soon after sunset John noticed a Microdipodops (megacephalus) run across the road and easily climb a ~1/2 meter rock boulder near the road. Although this genus is found almost exclusively on sandy, flat desert floors, they appear to be quite nimble on rocks. We drove past Fletcher, Nevada roughly and took the road SNE / toward Yerington. We camped at the above locality about 2100 at which time we set out 727 live traps around camp. The vegetation consisted almost entirely of some species of Atriplex (we think). There were very few Chrysotthamnus (sp.) - often associated with Microdipodops megacephalus.