Mr. Ridgway met with this Warbler in great abundance during its autumnal migration among the shrubbery along the streams of the Sierra Nevada, at all altitudes. In summer it was only seen among the high aspen woods on the Wahsatch Mountains. Fully fledged young birds were numerous in July and August. Their usual note was a sharp _chip_. This bird was found breeding near Fort Resolution, on the Yukon, at Fort Rae, and at Fort Anderson. The notice of geographical distribution of the different races, at the beginning of the article, will serve to show to what varieties the preceding remarks severally belong. Helminthophaga celata, var. lutescens, RIDGWAY. PACIFIC ORANGE-CROWNED WARBLER. _Helminthophaga celata_, COOPER & SUCKLEY, P. R. R. XII, ii, 1859, 178.—LORD, Pr. R. Art. Inst. Woolwich, IV, 1864, 115.—BAIRD, Rev. Am. Birds, I, 1865, 176 (in part).—COOPER, Orn. Cal. 1, 1870, 83. _H. celata_, var. _lutescens_, RIDGWAY, Report U. S. Geol. Expl. 40th Par. SP. CHAR. _Male._ Upper surface continuous bright olive-green. Whole lower parts, including superciliary stripe and eyelids, bright yellow, almost gamboge; abdomen somewhat whitish. Inner webs of tail-feathers just perceptibly edged with white. Whole crown bright orange-rufous, scarcely concealed. Wing, 2.40; tail, 1.90; bill, .40; tarsus, .67; middle toe, .45. Wing-formula, 2, 3, 1, 4. _Female._ Similar, but orange of crown almost obsolete. Wing, 2.30; tail, 1.90. _Young of the year._ Similar to adult, but with a brownish tinge above; middle and secondary coverts tipped with dull fulvous, furry, inconspicuous bands. No trace of orange on the crown. HAB. Pacific Province of North America, from Alaska to Cape St. Lucas. Straggling eastward to about the 116th meridian. Not found in Mexico? The differences between the Pacific coast specimens of the _H. celata_ and those from the interior regions—first pointed out in the Review of American Birds—are very readily appreciable upon a comparison of specimens. The present bird is a coast variety, entirely replacing the true _celata_ (var. _celata_) in the region above indicated. Helminthophaga peregrina, CABAN. TENNESSEE WARBLER. _Sylvia peregrina_, WILS. Am. Orn. IV, 1811, 83, pl. xxv, fig. 2.—AUD. Orn. Biog. II, pl. cliv. _Sylvicola per._ RICH. _Vermivora per._ BON. _Helinaia per._ AUD. Birds Am. II, pl. cx. _Helmitherus per._ BON. _Helminthophaga per._ CAB. Mus. Hein.—IB. Jour. Orn. 1861, 85 (Costa Rica).—BAIRD, Birds N. Am. 1858, 258; Rev. 178.—SCLATER & SALVIN, Ibis, 1860, 31 (Guatemala).—SCLATER, P. Z. S. 1859, 373 (Oaxaca); Catal. 1861, 29, no. 180.—LAWRENCE, Ann. N. Y. Lyc. 1861, 322 (Panama).—GUNDLACH, Cab. Jour. 1861, 326 (Cuba, very rare). _Sylvia tennessæi_, VIEILLOT, Encycl. Méth. II, 1823, 452. _? Sylvia missuriensis_, MAX. Cab. Jour. VI, 1858, 117.