Quest 1948 Choeronycteris mexicana 1 April 26 Mina La Fortuna, 2350 ft, 2 mi N Laguna Seca de la Baja Calif. One male put up by myself out of 5 adults and three young caught in mine digging at 10:30 PM. yesterday and 6:30 this morning. Bats were in spots completely protected from light and hanging singly. Hanging nearby were Antrozous. June 26 Arroyo San Louis, 800+ ft, 9 mi W. Calmalli, Baja California One female #437, no embryos and lactating, caught this afternoon by myself in horizontal shaft of mine here (see Journal pg. 138 for des - cription). About four more were caught by others of the group. All of this species were caught in the furthest recesses of the mine. Although they were all found in the same area they appear to hang singly. June 27 Locatn: One female, #442, and one immature adult caught by myself in the horizontal tunnel of the mine this morning. Three were seen in a side passage near the end of the tunnel (innermost) of which the above two were caught. The immature adult was released. The female contained one large embryo of 30mm, an interesting fact because of the lactating females and immature adults present. Evidently young are born over quite a long period of time.