Hafner, ms. 1974 Journal 20 April - 9 mi. N. Johannesburg, in "Copper-colored" hills 1 mi E. of Trona Rd. San Bernardino Co. 3200'. 08:00- checked traps with following results: 8 Dipodomys merriami 1 Ammospermophilus leucurus 23 Perognathus longimembris 1 Onychomys torridus (juv.) 1 Uta lizard. Trapping Success: 24/150 = 22%. This Onychomys was my first live captured specimen (and it died the following night from apparent stress.) The strong musky odor associated with this genus was very evident. It is our long held belief that Onychomys are escaping from our traps by methodically lifting open the door - this has yet to be tested experimentally. Several of our specimens, although vigorous when captured, have died in the following days - we attribute this to the fact that we are catching nearly all immature animals who are perhaps unable to cope with the stress of being captured - 1400- Paul and I entered a small cave (mine) very near camp and