Slightly crested; second quill longest, first shorter than third and longer than sixth; tail deeply emarginate; upper parts dusky olive, upper part of head much darker; a pale greyish ring round the eye; two bands of greyish-white on the wings, secondaries margined with the same; quills and tail-feathers blackish-brown; throat and breast ash-grey tinged with green, the rest of the lower parts pale greenish-yellow. _Male_, 6-1/2, 11. Throughout the United States. British Provinces. Labrador. Newfoundland. Rocky Mountains. Columbia River. Migratory. Wood Pewee, Muscicapa rapax, Wils. Amer. Orn. v. ii. p. 81. Wood Pewee, Muscicapa virens, Nutt. Man. v. i. p. 285. Muscicapa virens, Bonap. Syn. p. 68. Wood Pewee, Muscicapa virens, Aud. Orn. Biog. v. ii. p. 93; v. v. p. 425. 65. 12. Muscicapa Traillii, Aud. Traill's Flycatcher. Plate XLV. Male. Slightly crested; wing rounded, with the third quill longest, second and fourth almost equal, first a little longer than sixth; tail slightly rounded, and faintly emarginate; upper parts dusky olive, upper part of head much darker; a pale greyish ring round the eye; two bands of greyish-white on the wings, secondaries margined with the same; throat and breast ash-grey, the rest of the lower parts shaded into pale yellow. _Male_, 5-3/4, 8-1/2. Arkansas. Columbia River. Migratory. Traill's Flycatcher, Muscicapa virens, Aud. Orn. Biog. v. i. p. 236; v. v. p. 426. 66. 13. Muscicapa pusilla, Swains. Least Pewee Flycatcher. Plate CCCCXXXIV. Fig. 1. Adult. Third quill longest, fourth scarcely shorter, second nearly one-twelfth shorter, and exceeding the first by three and a quarter twelfths; tail slightly emarginate; upper parts light greenish-brown; loral band whitish, a narrow pale ring surrounding the eye; wings olive-brown, with two bands of dull white, secondaries margined with the same; tail olive-brown, the lateral feathers lighter, the outer web pale brownish-grey; fore part of neck and a portion of the breast and sides ash-grey, the rest of the lower parts pale yellow. _Male_, 5-2/12, wing 2-5/12. Columbia River. Fur countries. Labrador. Newfoundland. Rare in the Atlantic States. Tyrannula pusilla, Little Tyrant Flycatcher, Swains. & Rich. F. Bor. Amer. v. ii. p. 144. Little Tyrant Flycatcher, Muscicapa pusilla, Aud. Orn. Biog. v. v. p. 288. 67. 14. Muscicapa minuta, Wils. Small-headed Flycatcher. Plate CCCCXXXIV. Fig. 2. Male. Wings short, the second quill longest; tail of moderate length, even; general colour of upper parts light greenish-brown; wings and tail dark olive-brown, the outer feathers of the latter with a terminal white spot on the inner web; a narrow white ring surrounding the eye; two bands of dull white on the wing; sides of the head and neck greenish-yellow, the rest of the lower parts pale yellow, gradually fading into white behind. _Male_, 5, 8-2/8.