Murray 1940 Natalus mexicanus (Cant.) June 7 La Tenaja, 5 mi SE Punta Gasparina, (spelled) Baya Galy. Found them very hard to net, and swung at them many times and missed. They had an uncanny habit of varying their course after flying one way a few times. Avoided the direct beam of the flashlight usually, and were inclined to fly up to it and turn back. Was only able to net 19 after considerable effort. June 14 Mina Estrella Polar, 600 ft, 3 mi E Pescadero Found this mine in the hills, consisting of several inclined slopes which led to a horizontal shaft about 30 feet down. At the end of this was an almost vertical one about 4 ft. wide and much cross-braced with timbers. I could see bats flying down below with some coming up to my level. There were very skillful fliers, dodging in and out rapidly among the timbers, and often circling around them sharply. I found them very hard to net, and needed 5 or 10 minutes of concentration plus many swings for each capture. There were frequent loud slapping sounds of the bats hitting posts or walls, and several times I thought they struck wing tips together. All that I netted (4♂, 1♀) were bright