Hooper, 1936 El Dorado Can., 6000 ft., Humboldt Range, Pershing Co., Nev. July 31, barn. Frightened white-footed mice (Pero- myscus maniculatus) from the hutches composed of dried sticks, bones + varied "addities." Sceloporus were abundant around rock heaps & houthouses. Saw one Cnemidophorus under an Artemisia bush at about 7700 ft. Mr. Smith presented us with a small striped racer and a rattlesnake - both collected at about 7500 ft. The rattler was so mangled it was discarded. Collected 2 "Callos" at altitudes as given in catalogue. Microtus mordax has been at least 3 times running from bush to bush. Shot one specimen. Set two gopher sets, 2 rod traps, + 27 mouse traps this evening. The gopher diggings were on an alluvial fan composed of coarse gravel - little soil. Shot another M. mordax while setting traps. Shot a yellow-bellied racer - one of two which was in "tangle" over the "ownership" of a mouse carcass. Aug. 1, Found in traps this A.M.: 17 Peromyscus maniculatus + 2 Microtus mordax. Shot a Eutamias, was running toward a