Arnold, Steve 1963 JOURNAL April 10 15 miles south of Sonoyta, Sonora, Mexico: across a bajada toward a group of mountains about 1 1/2 miles away. A series of arroyos run S.E. to N.W. arroyos mountains road (15 miles to Sonoyta) Predominate plants: Saguaro, Cholls, senita cacties, palo verde, mesquite, creosote. Small squirrels were sighted in the rocks @ the base of the mountains and Scorpions (Centruroides) were taken under rock flakes but no Sawrourals were sighted. Cnemidophorus, Ute stansburianus, Ute ornatus, Pipsosaurus, Callisaurus, Sceloporus magister taken or sighted on the bajadas. Drove north to Sonoyta about 1:00 PM and then west along Highway 2 toward San Luis, Sonora. Stopped 35 miles west of Sonoyta, Sonora, Mexico - surrounding area largely volcanic with some open areas and scattered creosotes. Cnemidophorus, Ute stansburianus, and Callisaurus taken or sighted. Stopped about 15 miles E. of San Luis, Sonora, Mexico - reddish-brown sand - relatively flat flat plain - small hammocks @ bases of creosotes. One juvenile Utes sighted