Murray 1948 Journal June 11 La Laguna, 6200±ft., Sierra de la Laguna, Baja Calif. more open and only in spots did the trees grow over and furnish shaded places Also set out 6 Schnyler's, 3 in a large patch of prickly pear out in the open in the lagoon, and 1 each in another large patch and 2 small ones next to the woods. Left the mouse traps set. In the evening there were more small bats and fewer large ones, with not many of either. Shot 1♂ Pipistrellus hesperus. Eptesicus did not fly until near dark; then two were feeding in one spot and I shot 1♂. June 12 Same location. Caught 4 Peromyscus truei (3♀,1♂) and the tail and hindquarters of another. Possibly a shrew had eaten it. In the Schnyler's caught 1♂, 2♀, 1 discarded, each in a separate clump of cactus. Left the mouse traps set in place. Now I have seen two kinds of mice; as near as I can tell they are solitary and (Hutton's), though the latter is indefinite. Have spent quite a bit of time turning over rocks on the chance that there might be salamanders. The Hylas are very numerous under the many granite rocks along the streams. Found what must be a grasshopper sparrow out in the open. In the afternoon checked my traps and