Murray 1948 Peromyscus maniculatus Apr 21 Agua Hedionda, 32°30'N 116°16'W, Baja California Had out 50 live and 50 museum special mouse traps in dense growth of Adenostoma sparsifolia. This was from 4 to 7 feet high with bare lower limbs but growing close together. Here and there were open spaces with sage brush, and some manzanita and Ceanothus was mixed in. (See journal). The snap traps had 2♂,1♀ and 2 discarded. In the live traps were 3 which were released. June 18 San Jorge, 25°44'N, 112°09'W, Baja Calif. Set out 115 traps, 50 live and the rest museum specials, expressly to catch Beithrodontomys. Part were among bushes back of the beach, others along the edge of the strip of mangroves running along the shore or on the strip of tide washed Salicornia behind; the rest by dulce mangroves in back of the Salicornia. (Fully described in journal). The ground under most of the traps was muddy. Caught 2♂,4♀ maniculatus, all in the traps along the mangroves or in Salicornia which had been washed over by the tide. The mice were almost all dry. June 19 Same location This time had set 30 snap traps along the edge of the mangroves as before,