8/10/25 12 that I was unable to determine its characters. I saved the skeleton or better what remained of it No. 10321. I went back to the hollow tree where I had collected most of my white-lined bats (Saccopteryx). There were no bats in the tree but a female was clinging to a near by tree. The bark of the tree was white and she showed up quite plainly. I shot her with a twenty two shot pistol. A small band of spider-monkeys (Ateles) dashed off through the trees ahead of me. August 18, 1925 - Weather conditions the same as usual. The chief thing of importance to day was finding an arboreal mouse in a wren's nest (Thryophilus pleurostictus). I have not endeavored to classify the mouse. It's No. is 10323. As one of the fellows pecked into the nest the mouse ran out and would have run down the small tree to the ground had she not run quickly to the base of the tree. When I came up the little fellow was lying on the limb about two feet from the nest. Its eyes were large and black. This mouse very probably feeds on the eggs of this wren. This nest was about seven feet from the ground and was of a thin fine glassy structure. I shot the mouse with a shot pistol and saved the skin and skeleton;