Vireo olivaceus. DESCRIPTIONS OF THE FIRST PLUMAGE IN VARIOUS SPECIES OF NORTH AMERICAN BIRDS. BY WILLIAM BREWSTER. III.* 48. Vireo olivaceus. First plumage: male. Remiges, rectrices, and greater wing-coverts as in adult; rest of upper surface, including the lesser wing-coverts and rump, light cinnamon, tinged with ashy, and upon the interscapular region washed faintly with dull green; cheeks pale buff. Supra-orbital line and entire under parts silky white, with a delicate wash of pale brown on the sides. From a specimen in my collection taken at Upton, Me., July 30, 1874. Bull. N.O.C. 3, July, 1878, p. 115.