JESimpson, 1938. 2150', La Estancia, 6 mi. N. Nacori, Sonora. May 18, 1938, continued. so bagged two or three deer there. The points of the sticks are fire-hardened before sharpening. May 19, 1938. In mousetraps on hill caught 1 Lemmys pictus (no. 590) and 3 Perognathus penicillatus (207 and 18; badly eaten by ants, not saved). In the live-traps Perognathus penicillatus and 1 Peromyscus eremicus (both turned loose); however, Dr. Benson's mousetraps which alternated with these live-traps caught 3 Onychomys torridus and 6 Peromyscus eremicus: 9 for the mousetraps and 2 for the live-traps set on the same trap-line. Only at Costa Rica Ranch have the live-traps ever approached the effectiveness of the mousetraps; however, at Costa Rica in a wheat field (stubble) we caught small mice in the live-traps: Perognathus flavus and Reithrodontomys sp. The effectiveness of the live-traps is restricted to special habitats and seems selective enough for small mice. The live-traps are advantageous in that they are early and quickly set out, and the mice may be kept and transported safely and easily in them. The three sticks in the wheat-field as mentioned above killed a young-buck white-tailed deer. The only apparent injury was on the throat where a stick had pierced. We bought the skin and skull for a specimen and heart, liver, a shoulder, and a ham for food. Dr. Benson