Aug. 23, '12 streams in which we found R. tarahumara. The "strikingly spotted" (quotes Wright and Wright) R. Tarahumana Tads are quite distinct from any others I have seen, by virtue of the spotting of black on a pale quench-gray ground color. Tads and transforming young were collected. The dorsal color of the adults is brown, very similar to that of southern California B. t. boylii. The half-grown R. tarahumara resemble R. boylii quite closely, but the adults are bigger than any boylii or murra which I have seen. This is some yellow in the groin region. Rana pipiens was very common, both in the area occupied by Tarahumara and in the less well watered upper portions of the canyon where no tarahumaras were found. An egg mass found attached to the rocky bottom of a small pool could belong to either species. Also collected in the canyon were Kenostoma sonorense, Thamnophis equus, Cnemidophorus gularis otilmentic, and Hyla arenicolor. The latter is represented by me adult and one trans- forming tad.