Murray 1948 3 Neotoma lepida May 26 El Carrizalito, 1400±ft., 5 mi N Santiago, Baja Calif. Above the unfinished tuberculous sanitarium in which we are camped is a steep hillside thickly scattered with large granite boulders and bearing many wild figs, mesquites, copals and other trees, plus some groups of palm trees. Saw a number of woodrat nests under the rocks. Set 13 Schuylers, avoiding these nests for the most part. One trap caught a young ♂. June 12 La Laguna, 6200±ft., Sierra de la Laguna, Baja Calif. Set out 6 Schuylers as follows: 3 in a large circular patch of prickly pear with a boulder and a tree in the center, located out in the open; 1 each in 2 small cactus patches and 1 in a large patch along the edge of the trees. Caught 1♂, 2♀, 1 discarded. Each rat was in a separate clump of cactus. Dr. Benson had 4 traps in one large c lump and caught 1 rat, making it appear that only one lived in each no matter what the size. June 29 10 mi SE Mezquital, 400±ft., Baja Calif.