E.L. Karlstun 1954 Bufo canorus (36) June 19 NE side of Triega Pass Ranger Station, Mono Co., Calif. pool over 20 yards SW of deadfall at N margin of my study area. Shallow, to 2" depth, with scattered reeds to 6" height. One ov & angling pair here and no less than 5 other males within one 10 feet square. Water temp. when pair lays 22½° in sun at 12:45 P.M. (O.S.) Pair collected and separated. Other males collected same procedure. Mud very bad, and toads conceal themselves in it. I made check round other meadow ponds and potholes. One shallow (to 4") pool had toad today developed out and active. Water temp. 32° C. 1:15 P.M. Toads same size as those collected earlier today. June 21 Peaugy Meadow, 7300 ft., Y.N.P., Mono Co., Calif. 4:15 P.M. (O.S.) I closed chart on water thermo- graph. No air thermometer in operation. Hot sunny afternoon. The meadow area grasses gone to greenish-yellow, average height 5", range 3-10. Dordecuthem new 6" tall; Penicullus also blooming at 4" high. Non shady margins the Frigilla blossomed out. Clover and a yellow sunflower also in bloom now. The water level in main meadlet reduced about ½ from few weeks ago. However, seepage flows continue W side of meadow, and thermal unit still submerged where I have water thanograph. Thermograph 22 yards E of small lodgepole pines lining meadow. It is 8 yards W of main meadlet. Thermal element is in slow moving flow (" below surface in loose silty orga