Hooper 1939 July 30 N.E., edge of Alkali Lake, 4200 ft., Salse Co. Ore. The 20th place. July 31 2 mi. SE Vinton, Plumas Co., Calif. Upon picking up the trap line described above at Alkali Lake, I found the following catch: 4 Microdiplops megaplohu 2 Dipvelomy mierops 2 φ 5 Dipvelomy arclii 10 Peromeyus maniculatus 1 R. eithrodonTomys megelotus φ About 10 am we left Alkali Lake and drove on south through Alturas to Vinton in Plumas Co., Calif. Here we again made a temporary camp for the night. August 1 Berkeley, Alameda Co., Calif. Leaving Vinton at 8.30 we drove via Siepraville to Truchee and then via Sacramento to Berkeley.