Quest 1948 Eptesicus fuscus 3 May 25 El Carrisalito, 1400 ft. 5 mi N. Santiago Baja California. Three females (#254, 255, 256) caught by swinging fine wire over open water tanks last night. The bats presumably were flying low over the water to drink. All were caught thus well after the sun had set and at about the moment when full dark sets in. All three fell into the water after hitting the wire stretched tightly about ten inches above its surface and were swimming towards the sides. A Pipistrellus hesperus and two of the Eptesicus hit the wire simultaneously and were caught. Two of the specimens had two embryos apiece of 7 mm and 5 mm. June 10 San Juan de la Barradera, 1600 ft, Whas diera Laguna, Baja Cal. Shot two males about 7:30 PM yesterday (#340, 341). As usual the Eptesicus appeared later than the Pipistrellus hesperus which were seen 10-15 minutes earlier. The Eptesicus were flying across the flat area in which we were camped at a height of about 20 feet and in a straight line when obtained. At late dusk it was noticed that they fed much lower in the air, curling around the leafless trees and bushes at a 6-10 ft level. They make a "clicking" noise, similar to Pipistrellus hesperus but more slowly and loudly, when feeding. June 12 La Laguna, 6200+ ft, Sierra de la Laguna, Baja California One shot at dusk last night (#347) and also