E.L. Karsten 1954 Buffy brown (30) May 24 stream mead., 4000 ft., Yosemite Valley, Mariposa Co. Caliy. the ditch adjacent to the footpath SE of pond A shows similar effects of drying up. Higher ground now interrupts the ditch and a series of pools are left. maximum depth 4". Buffalo toads are plentiful and occur 2-3 times as large as those gotten from pond A. Water temp. 8:05 p.m. (D.S.) 20.8°C. Bufos easily so plentiful as Hydras here. The ovicide are so concentrated that one short sweep of hand net could produce 50 toads and Hydra toads. 5 deer approached to within 20 feet of me as I sat taking notes. The presence of deer in nearly all the meadows must constitute some degree of hazard for adult toads and true frogs, especially since the period that the deer browse and the toads emerge during the evening may nearly coincide. May 25 ½ mi. S of Court Center, Yosemite Valley, Mariposa Co., Calif. 12:10 p.m. I made a hurried check of study locality. max-min. readings taken and toads- themographs checked. Watch for frogs. rise 12:30 p.m. due to sun on air thermograph. instrument calibrated and checked out to ± 1 degree with Schluter's quick recording thermometer. Two 3 feet long sweeps of bottom of study pool made and sample kept. Depth 10" where sweeps made. Hydra toads present but not in great numbers. Largest to find limb strays. note toas in bottom sample. The meadow is one more