Erickson 1934 Peromyscus crinitus Tule Tank, 1250 ft. Yuma Co., Ariz. Jan. 19, 1934 Eight individuals taken on rocky slope on north east facing slope above tank; three on rock surface going straight up slope, rest on wide sloping surface below crest of ridge; much weathered granite, many loose stones, plants about same as at Tinguas Altos. Specimen no. 224 taken 25 ft. up from floor of canyon in creviced rocks, on small area of coarse gravel under shrubs; loose rocks about 7 ft. distant. Another specimen taken 12 ft. directly above last time. This one a female taken in trap set at hole into rocks; front part 3 inches across each way; two smaller holes opened off this about 10 inches back under rocks; specimen still alive; saved by warming up in pocket; was caught by tail only. Specimen 223. Taken at top of steep loose rock draw on small fine gravel area under a palo verde along trail at base of rock extending 3-4 inches above it; hole, about a foot and a half higher on slope, 36 mm. high, 54 mm. across; leads back under loose rocks and to crevices of granite base. Still alive squeaked "quick" repeatedly; did not right itself when released from trap; leg injured; killed. Specimen 222, ?, taken 30 ft. from last at base of small shrub, no holes near. Specimen 221, ?, taken 50 ft. farther along on slope under stout stemmed bush, in nest between rock and trunk; no holes near. No. 220, ?, taken 75-100 ft. from last in fresh rock slide across weathered granite slope; holes under rocks within a few feet.