Elkington 1955 Buffalo grass April 12 night check of several Yosemite Valley toad localities. 7:50 P.M. 1/2 mile SW of Govt. Center. Discovered an area of sinks at this lower end of a long broad meadow. One pond (describe later) is extensive, deep, and appears permanent. No signs of toads or eggs. Byla numerous, very numerous and active. Garter snake (Thamn. elegans) spotted with night light lying in the water and apparently feeding on byla. Due, of course, is a predator on toads as well. Pond temp. 1" below surface 1 foot from edge where depth 4" was 14.80 C., at 7:50 P.M. Air temp. 1" over dry grass 7.30 C. and 1" above pond surface 8.0° C. Some "steam" rising off water. Stormer meadow revisited. Two byla observed in the ditch but no signs of toads around only available water or on the path ways, snake crossing the meadow. Earlier in the day I observed very recent evidence of recent rodent activity - casts of microtus lunatus one under the arrow, [illegible] other microtus runs in grass, gopher mounds and burrows, many vole mounds, some ground squirrel burrows under pines and black oaks bordering the meadow on the SE. The same was true for the meadow south of govt. center. The large ground squirrel burrow at Stormer run deep and probably afford good