Grinnell -1915 Yosemite, Calif. 11 to see what material was used in nest construction. Wild strawberry plants and ferns grew close about the nesting site. In a shady spot among the pine trees we found a warbling vireo's nest in plain view 4 1/2 above the ground in the forking of two almost leaf- cless branches of a Rhamnus bush. The parent was brooding four white eggs very sparingly flecked with tiny reddish brown specks. The color of the brooding bird blended well with the gray bark of the brush and the gray nest material, but her bright- black eye was very conspic- ous. She did not fly until we were within four feet of her. The nest cup was about three inches in diameter and measured 6 1/2 inches around the bottom [3"/6in. ] from rim to rim.