Quast 1948 Pipistrellus hesperus 1 April 10 Punta San Felipe, 50 ± ft, Baja California. Three seen flying westward by camp at 7:00 P.M. this evening. One shot last evening and another this evening (#35+36). Bats possibly flying from sea caves and rock crevices of Point. Seen feeding close to ground along beach in pairs and groups of four and five at dusk. April 11 One seen flying over camp 6:00 A.M. 9:30 P.M.: Pipistrellus started flying toward San Felipe from the hill NE (previously stated as East) of camp at 7:00 P.M. The Pipistrellus came in loose groups, for four or five would pass over in one interval of time with none in the following interval. Later the Pipistrellus were seen feeding close to the terrain. Two instances were noted in which a probable Pipistrellus circled a person completely at about the level of his waist at a distance of about two feet. April 14 El Mayor, 30 ft, Rio Hardy, Baja California One shot flying singly over roadway at 10:30 A.M. by Dr Benson. Bat did not appear to be feeding and was flying slowly in one direction. April 17 Cerro Prieto, 30 ft, 20 mi SSE Mexicali, Baja Calif. I shot one flying at dusk along border of mesquite trees when they met an open field.