Grinnell -19/5 22 Yosemite, Calif. bank fibres, weed stems and white spider egg cases. It contained four tiny young June 26 The young Black-headed Grosbeaks in the Rhamnus Californicus brush by the roadside have their eyes open. All their feathers have broken from the sheaths. The little Tolmie Warblers have a dark gray down which is purple where the sun-light strikes it. The eyes of the Warbling Vireos in the Rhamnus Calif-ornicus bush are still shut. The Russet-backed Thrushes have left the nest, but are still in the immediate vicinity, as is evidenced by the anxious calls of both parents who are on dead pine branches near by. The nest is a bulky affair set firmly down in the crotch of three willow branches which point