per, 1935 7mi. Et. Mariposa, Mariposa Co., Calif. Aug. 12, diggings. I captured and preserved six bats of the genus Mystetes last night and this morning. They were found hanging with- in several old, black, rubberized coats found hanging in one of the outhouses on the Woodard property. Droppings under- neath each roosting place and parasites commonly known as "sheep ticks" on the coats indicated that the bats used these places regularly. Wood rat nests are located among the granite boulders, in the crevices, for the most part. In such situations the hut cannot be more than two feet high, or at least none have been seen any higher. The houses are made of driftwood; no fresh cuttings have been seen around these huts. One proper nest was found lying out on the granite boulder not covered by any sticks but protected to a great extent by the overhanging rocks which protruded outward for about six feet. One old nest was located up in a live oak tree about six feet from the main trunk, eight feet from the