Murray 1948 Perognathus spinatus Apr 6 Cocopah Mts, E side, 22 mi. SSE Mexicali, Baja Calif. 50 live traps set in a rocky, sandy wash caught 2♂. The vegetation was principally creosote and ironwood, and talus covered slopes were all around. Apr 9 Punta San Felipe, 50± ft., Baja California Out of 50 live traps caught 1♀. These traps were set on the talus slopes of the steep hills near the shore. The distances were about 25 feet between traps Apr 10 Same location 50 traps in the same type of rocky area had 1♂2♀. Tonight there is one running freely around in back of the house in which we are camped. ♀ comes out of a hole, is a little timid of movement, but ignores the light. The house is on a sandy flat, but there is a rocky slope just behind on which spinatus have been taken. This species seems quite abundant up on the talus rocks, but was not caught in sand. Apr 13 9 mi W San Felipe, 700±ft., Baja California. The mountains here were all granite, of a yellowish gray color, greatly decomposed. The slopes were rugged and rocky, with light growth of creosote and other bushes with some ocotillos. 50 traps were set 25 ft.