E.L. Kalstine 1954 Bulfer boreas (1,5) April 24 Stoneman mdw., 4000 ft. Yosemite Valley. parallels road immediately N of pond A; site N of road 50 ft from it. No tods or eggs. Orchid at NE edge of meadow, apple trees in full bloom, with new leaves. Black oak reddish brown leaves and catkins - just coming out (some) black coltmwood yellow green leaves, just out. April 25 Out last night to check Stoneman mdw., meadow 1/2 mi. S of Grt. Center and one SW of Old Village. Many Hyloa chrusing but no tods. Stebbins and I worked 7:30 - 9:30 p.m with headlamps. # No tods except tods at Stoneman previously noted. Stebbins took photos of pond at Grt. Center locality looking W toward Bridalveil area. Also photo looking toward Half Dome. Air 12°C, water 14.5°C. 8:30 P.M. Took sample of pond life from edge of pond 175 ft WSW of study pond. This pond in full sun all day. Made two long sweeps of 6" wide net in shallow NNE side of pond. Net surged thru dead grass at pond's edge. 10:30 A.M. (D.S.) Water temp. 15.0°C. (1/4" under surface, 1 1/2 feet from pond edge) Air temp. 1" above dry dead grsse surface, 6 ft. from edge of pond 21°C. gusty light breeze (bulls shded). Area fully illuminated. Temp. just under saturated soil surface 12 feet from above pond 26.3°C.