24 May 1975 DEL PUERTO CANYON, STANISLAUS CO., CALIF. 24 MAY ; JOHN RUBEN & ALLEN GREER John and I went out to Del Puerto Canyon in order to catch some Uni Crotales for his thesis work. We planned to work various localities during the late afternoon and then might drive the paved (lower) part of the road. We worked two localities during the late afternoon but got or even saw very little. Only at the following (second) site did we have any luck. 90 Cnemictophorus Shot along the road above the stream. Sceloporus several seen on the trees and rocks. Thamnophis a large gravid female in the grass along the side of the stream. Pituicatermic heard calling along the stream. 89 Got the following night driving. Pitophis melanoleucus catenifer - 1.0 miles W. of I-5 on the Del Puerto Canyon Rd. DOTZ in the late afternoon. In the grassy area west east of the hills. Saw several others this night. Crotalus viridis - got two off the paved section. one locality does The smaller individual was found about 2 mi.