E. O. Miller 1940 General Account. others also. In the morning we went up to look at a bat cave. We were assured there were hundreds of bats in it. The cave was in the Arroyo San Bartolo about a mile W from camp. The cave was about 200 yds long and large enough to stand upright in in most places. There was a strong smell of Tadarida at the mouth, and further in we found small quantities of bat feces. We saw but one bat, however, which we were not able to capture. I collected Broad-tailed 17 specimens of Sceloporus in the canyon, and one Golden-eared Hummingbird. April 2 Stayed in camp and put up C. variegatus couchii which the natives brought in considerable numbers, some trapped and some shot. Benson shot a Broad-billed Hummingbird at camp and I prepared it. We expect to leave for Monterey tomorrow. April 4 On April 2 in the evening I shot four Pipistrelles, 20♂ 2♀. On April 3 we went to Monterey, when Benson managed to get himself a "courtesy Permit". The American Consul, Mr. Moses, invited us to dinner, that so we were forced to spend the evening in town. On April 4 we drove toward Matamoros to a position 31 miles ENE of Bravo, Nuevo Leon. In late afternoon I set out 50 M. Specials and 10 Schuyler No 1s. I shot a Red-billed Pigeon, a Golden-fronted Woodpecker and a Wood Rat. After dark I set out 50 small live traps for mice. Habitat here is mesquite, otter brush, prickly pear cactus and other cacti. The growth