Erickson, M. M. 1934 Yuma First Yuma 5 Jan. 2, 1934. Spent from early morning to middle afternoon at sloughs above Laguna Dam. Ran traps; catch 5 Peromyscus m. sonorensis, and two house mice, one of latter eaten; racoon tracks abundant, drove up along sloughs 5 miles farther, country similar; found same sort of bird tracks in tules and cane, but not positively identified as rails; set 24 large traps in runs. Spent an hour or more on mesquite, creosote and few tree cacti; no birds seen. Ran traps before leaving, no catches. Set additional traps at location of previous day. Similar bird tracks here. Jan. 3, 1934. Set dozen large traps in ditches filled with tules in general region of Bard on Laguna Dam road; tracks of some bird common in runways here. Took up traps in sloughs above Laguna Dam; catch 3 Sigmodons one Peromyscus m. One of Cotton rats much eaten. Racoon tracks common around trap and whole region. Ran traps in ditches by Bard, one Sigmodon taken. Jan. 4. Spent first half of morning on California - California side of river near Yuma, hunting places suitable for Le Conte Thrasher; little suitable country found, no thrashers in these. Ran Traps near Bard, no captures. 6:00 p.m. ran traps again, no captures.