Murray 1948 Pipistrellus hesperus Apr 12 San Felipe, 50 ft., Baja California Each evening at dusk we have seen several flying over our camp or down close to the shore. Several were shot by the others. (See journal) Apr 14 El Mayor, 30+ft., Rio Hardy, Baja California. Located by the river next to dense mesquite thickets and other vegetation with mountain nearly on the other side. Saw several bats at dusk last night. This morning as we were leaving at about 8:30 or 9:00 a pipistrelle flew down the road in a straight line. Dr. Benson shot it. May 7 Rancho Cadeje, SE end Bahia Concepcion, Baja Calif. This evening at dusk there were a number flying. Most of them came south up the road, dove at me, circled the barrel of my shotgun and flew on. The action was amazingly consistent, though some of the bats just flew by overhead. All seemed to be pipistrelles - shot one small one. The locality was a dense strip of dulce mangroves and salicoria between the sea on the east and rocky mountain on the west (see journal) May 17 Triunfo, 1700 ft., Baja California Have seen a number flying around here yesterday and today, starting to