16-17 July specimen collected on 10 July (# 1/7). Stayed at the La Enchantada Motel on the north side of Hermosillo and also ate at the motel. Even stayed up with John & Philip dancing & talking until midnight in the motel's bar. No geckos seen on the motel's walls. 17 July Got up about 8:15 AM and spent most of the morning doing chores and getting Jim's bus checked out to make sure we had done nothing more serious than break the oil filter. Took off east of Hermosillo about noon to find John a Cnemidophorus lutea locality. Finally pulled into a rancho 2.8 miles S.E. junct. Mex. Hwy 16 and the Mazatan Rd. on Hwy. 16, Cerro la Agualurca This is a typically flat part of Sonoran desert with several isolated mountain outcrops. The latter being the Cnemidophorus habitat John wanted. In particular we worked on and around a small mountain which the ranch owner called Cerro la Agualurca. We saw and caught the following: 250-255 Dipsosaurus dorsalis: Abundant Throughout the flats between the main Hwy. & The Cerro. The density was amazing - probably much greater than the Cnemidophorus. The