Hendrickson 1950 Journal Sept. 1 Black Rock Spring, 4500 ft., San Bernardino Co., Calif. neering off or "backing away" at the last instant. Three times bats flew solidly into the net; two of those were temporarily ensnared. Sept. 2 Morning began completely overcast, but sky had fairly well cleared by about 9:00 A.M. Hunted toward spring, taking Deeloporus from piñon piñon trunks: cloacal temp. = 32.2° C., dappled shade = 30.7° C. Jerry Russell and I watched the area around the spring for awhile. Only quail, jaya, and warblers visited the water. The traps at the woodrat nests were empty. I left the spring and followed a much-used deer trail eastward around the main N.-facing slope of the mountain into the next major wash, then worked up the wash (5.) and circled back to the road following the ridge most of the way. On the main N. slope took a Deeloporus from a Joshua Tree (about 8' from ground): cloacal temp. = 36.3° C., shade temp. = 38.5° C. Many deer(?) beds were seen on the slopes E. of the road, mostly under piñons (beds in piñon needles. I saw one deer for an instant at a distance of about 500 yds.