742 Myotis (1) Silvose 1933 Maa R. Lord, 2700 ft., above Ruth, Trinity Co., Calif. May 26, 1933 Not common. Generally seen close to trees or near brushy hillsides. Fly low and erratically. Easily distinguished from Lasionycteris by smaller size, more twisting flight at lower level 5-10 yds., and occurrence near the brush or trees. May 29, 1933 Several seen at late evening at willows at river's edge. So quick is the flight of this bat & too darting his movements close to the shore or ground that one rarely obtains a glimpse of one above the horizon long enough to aim adequately and shoot. Horse Mt., 4700-5200 ft., Humboldt Co., Calif. June 7, 1933 None seen.