J. Rodgers-1939 141 Itinerary etc. April 20 Mt. Diablo, Contra Costa Co. to San Joaquin River about 6mi SW Lathrop, San Joaquin Co. this point on the east slope a little draw. there is a series of rock outcrops. The country is grass covered but in the draws there are some trees. These outcropping are interspersed with Blue oaks (Quercus douglasii). Under these rocks I found Anoised l. lugubris, Seloporno s. occidentalis, Diadophis amabilis and Lampropeltis g. boylii. (See p. 119 - no. 1917-1925 in catalogue) Seloporne were common. I kept one because I killed it accidentally. I followed on up this road to where it meets the road from the "west" entrance, followed it around the head of Pine Canyon and on down met of the park and nearly to Danville. I turned east toward Pleasanton, then south to Pleasanton. From Pleasanton I drove west to the hills, returned to Pleasanton then followed a road to Anoys del Valle. I went up Anoys del Valle about 6mi and back then went through Livermore, over the new highway over Altamont Pass and through Tracy. Camped about 6mi SW Lathrop