Murray 1949 Journal June 7 La Tenaja, S mi SE Punta Gaeparina (Cape Diet) Baja Calif. After putting up specimens and eating, Dr. Benson, Tevis and I rushed back to another location we had heard about, this time up the same Canyon de la Tenaya to the water hole for which it was named. Here a road went up into the hills a short distance, ending at an old ranch house. The stream bed were full of granite boulders and green bushes, mesquite and others. The water was brackish and dirty, comprising two small pools linked by a short flow. The lower was a little larger, about 3 x 6 feet. At dusk several bats were flying, apparently pipistrelles for I shot 2. When almost dark some Natalus mexicanus appeared at the pool. There were never more than 3 at once, and usually just 1. It would appear briefly and leave, then return or be replaced by another. Almost always flew very low, within 2 or 3 inches of the ground, and crossing rapidly over the water or among the bushes. They were skillful fliers and very elusive. Was only able to net one in the course of considerable effort. Before the bats came out I set 50 live traps along both sides of a sandy