Murray 1948 74 Journal May 20 | mE. San Antonio, Baja California Put up specimens and continued on through hills covered with a feathery growth of Palo blanco and some copals, lumbei and paloverde. At San Antonio we visited a mine with a long horizontal shaft containing a number of bats, but found the way blocked and the bats gone beyond. Did manage to net 3, Macrotes californicus however. A mile past the town we found a mine well up the steep hillside with a sloping entrance, a couple of side passages, and then a very deep and steeply inclined shaft going down. As we first approached, saw many bats flying in the entering passage. Trapped a number of them in the two branches, mostly Macrotes californicus and a few of what we believe to be Septonycteris. Then Dr. Benson descended into the shaft, from which we could hear a roar of wing beats from hundreds of bats. Many of these he drove upward and we trapped and caught them with a large net stretched over the mouth of one passage. The shaft turned out to have another entrance at road level. Many bats which had been