Davis 940. 3). 25 mi. S. Needles, 475'; San Bernardino, Calif. Dec. 22. The legumes of ratsclaw (Psorothamnus sessiliflorus). The rats, upon being started, never went far from the nest and were easily caught. One attempted to go down a hole adjacent to the nest, but we had already plugged this up. Skinned at m. and left in early p.m. Proceeded to Blythe, then proceeded to a point: 4 mi. S. Palo Verde, 275'; Imperial Co., Calif. Dec. 22. Creosote-franciscana dumosa association, but very little cactus. Set traps in a wash with creosote bush, franciscana, palo verde, and desert ironwood (Olneya tesota). Much sign, but it seemed old. Some mesquite (Prosopis chilensis) noted. Weather here clear and very much warmer than at last camp. Birds were heard after dark. Dec. 23. Caught 5 Dipodomys deserti. On a small ford near camp noted coot, shoveller, pintail, canvasback. On the shore were vermillion flycatcher, Audubon warbler, verdin, phainopepla. Drove south to a point: 7 mi. N. E. Fort Yuma, 200'; Imperial Co., Calif. Dec. 23. Made camp in a thicket of honey mesquite (Prosopis chilensis). E. & W. of camp a few