5.0 mi. N. Castle butte, Kern Co., Calif. Mar 26 20 miles to the north and informed my co-worker from Berkeley, Sheila Byrnes, that I intended to terminate the trooping effort. She agreed with this, as the results were poor, but decided to stay on at Starlock Bar experience's able. I delivered the traps to her, and drove into Fox Angeles. 1/4 mi. SE W C and Sierra Highway, Lancaster, Los Angeles Co., Calif. Mar 29. Left Northridge at 4:40 PM with Doug Yoon and friend, Ron Tautkian, in another car. Trip to trooping site of 62 miles took 67 min over Rt. 14. Arrived at 5:45 PM, and sorted equipment. We were late, having only a half hour of sunlight and half hour of twilight to set our traps. The habitat is uniform Alkali Sink, almost all bushes being shadscale, Atriplex confertifolia. These bushes grew singly, spaced out, or in low mounds, in any event hard for separated the clumps of vegetation. The wind was blowing about 30 mph and temperature was 45-58°F so the chill factor was high. We began setting our traps perpendicular to the road about 1/4 mi. S of our C on a telephone Co,