L. Karlstrom 1954 Bufo boreas (25) May 14 1/2 mi. S Carl. Center, Yosemite Valley, margina Co. Calif. of the sedges (?) go as high as 30" length but stand isolated. Tallest grasses are in low pond areas (as in middle of study pond). The willow-like bushes described previously as to 10' height and partially leafed-out, i.e. 1/2 the buds have burst. Wild rose (?) intermingling with the other plants in clumps is fully leafed out. Other fully leafed out. Meadow in Valley are almost fully green. Some acceleration in bloom of filamentous algae. Hyla tad present in study pond but not abundant, single taken. One Hyla egg cluster (to remain store) seen in study pond. 10:00 A.M. Both thermographs working perfectly, calibrated with Shuttle's quick-reading thermometer, decided them and left meadow. May 22 Same locality as above. 8:55 P.M. Two adults, one ? and other ?, tadpoles picked up in brook area 20 yards S of main road as I stood with friends awaiting the "furious" Yosemite Fireball. Not worked since no equipment along. Released right away. This Hyla, dry broken area seems a favored food spot. May 23 Night check at Carl. Center locality revealed 3 adult toads. Temperature data follows (see data sheets for worked toads) Specimen # 3b, ? in dry sandy soil. Cloacal 12.5°C, Air 12.5°C; 11:05 P.M., # 4b ♀ in edge of crushed gravel footpath, cloacal 10.5°C.; Air 11.2° C. Time 11:27 P.M., # 5b on dry sandy soil cloacal 11.0°; Air 9.5 °C.