Harderickson 1950 Mystis thysanodes Aug. 27 Lower Corington Plate, 5000 ft., Riverside Co., Calif. At about 4:45 P.M. took an individual hanging at Corington springs from roof of tunnel about 26 feet back from entrance. For this distance the tunnel runs almost due E.-W., and the spot where the bat was hanging was fairly well illuminated. The temp. at the point where the bat hung was 23.9° at this time. Bat was restless and about to take off when captured.