Quest 1948 Tadarida mexicana 3 May 2 Mulege 25 +/- ft Baja California a hammer, the four of us netting 22 with the hand net. I put up 6 specimens (# 110-115 inc.) of which 5 had embryos ranging from 3 to 6 mm. It is interesting to note that the females I put up from San Ignacio contained no embryos. May 17 Trunfo, 1700 ft. Baja California Approximately 100 specimens obtained yesterday from 2x12 supports to second-story ceiling of abandoned building in town. Five or six times as many Tadarida were roosting there. They roosted in the long cracks formed by doubled 2"x12" supports for the ceiling and were routed out and captured by stirring in the crack with a thin stick while holding the net under- neath. The bats dropped by the dozen into the hand net held below. Roosting with the Tadarida, in the same crevice, were a few Myotis velifer. The bats were hung in a large burlap sack in a Mesquite tree in camp last night preparatory to putting up as specimens this morning. We awakened to find only 10 rem- aining in the sack, the remainder having escaped through holes chewed in the sack last night. The remaining specimens were catalogued by Dr. Benson.