Smiley 1936 July 10 Took in traps set last evening at: 17 mi. W. Deephole, 4800 ft., Washoe Co., Nev. cought: 1 Rheithrodontomys megalotis, 1 Peramyscus truci, 5 P. maniculatus, 5 P. crinitus, 3 Perognathus parvus. Drove back to camp on Smoke Creek. Broke camp at 3:30 PM. Drove approx., 60 miles to camp: Rock Creek, 5000 ft., Granite Mt., Washoe Co., Nev., set out 27 mouse traps about 8:30-9:00 PM with aid of flashlight. Trap line in a small V-shaped water course (dry) up the mountain side for 200 yards; thence circled up out of water course and back down the hillside. Pursued a Perognathus parvus: it dodged in a hole under a rock, then out and into its burrow under a 50 lb. rock. This was moved. The burrow was along the buried surface of the rock to its middle (1 foot), thence at right angles into a chamber (small opening to it) from which three burrows radiated each for a distance of 4-5 inches; these radiating burrows ended blindly for no apparent cause - no rocks prevented further digging. Mouse was captured alive as it fled from mouth of the chamber. At 10:30 AM found screech owls perched (a shed, not a toilet) in upper corner of a 10' x 10' out-building at point where roof joined west and north walls,