Journal Hafner, U.S. 1976 San Joaquin Valley, Vicinity of Buttonwillow, Kern Co., Calif. June 3 1000 John Hafner and I drove via Livermore and I-5 to Hwy 98 (NE of Coalinga.) We turned E and drove to Hwy 41 where we turned south. Just before the intersection of Hwy 41 we stopped and set out 50 live traps in a Salicornia-Suaeda habitat near the road. This was an attempt to capture D. nitratoides nitratoides at its northernmost range (assuming the Kings River to be a natural sub-specific boundary). (Calif. Fish and Game Project.) - On the trip down Hwy 5 (mentioned earlier) John and I noticed fairly extensive sand dune regions on the hill-tops of the Diablo Range approximately 25 miles SW of Mendota - on the west side of I-5. Good potential habitat for Dipodonyx and Perognathus. - Anyway, we drove by Guernevy, Calif. then turned south on Hwy 43. We continued S then turned East on a farmroad about 1 mi. N of Angiola. We set 50 traps in semi-natural Suaeda habitat just south of the road about 1 mi. N, 2 mi E of Angiola. (Actual locality taken from Tipton). We drove south to the Pixley locality of 12th February and set out 50 traps as before. We paced these off so as to cover an area of approximately 2000 sq meters. We continued S on Hwy 43 through Wasco and Shafter then turned west onto 7th