_Motacilla citrea_, BODD. Tabl. 1783 (Pl. enl. 704, fig. 2). _Protonotaria citrea_, BAIRD, Birds N. Am. 1858, 239; Rev. 173.—SCLATER, Catal. 1861, 26, no. 166.—GUNDL. Cab. Jour. 1861, 324 (Cuba; very rare). _Helminthophaga citrea_, Cab. Jour. 1861, 85 (Costa Rica). _Motacilla protonotarius_, GM. _Sylvia prot._ LATH.—VIEILL. Ois. Am. Sept. II, pl. lxxxiii.—WILSON, Am. Orn. III, pl. xxiv. fig. 2.—AUD. Orn. Biog. II, pl. iii. _Vermivora prot._ BON. _Helinaia prot._ AUD. _Helmitherus prot._ BON. _Compsothlypis prot._ CAB. Jour. _Motacilla auricollis_, GMEL. I, 1788, 984. _Sylvia aur._ LATH., etc. (based on _Le Grand Figuier du Canada_, BRISSON, Ois. III, 1760, 508, pl. xxvi, fig. 1). Female. _Sylvicola aur._ NUTT. Man. I, 1840, 431. SP. CHAR. Bill very large; as long as the head. Head and neck all round, with the entire under parts, including the tibiæ, rich yellow, excepting the anal region and under tail-coverts, which are white. Back dark olive-green, with a tinge of yellow; rump, upper tail-coverts, wings, and tail above, bluish ash-color. Inner margin of quills and the tail-feathers (except the innermost) white; the outer webs and tips like the back. Length, 5.40; wing, 2.90; tail, 2.25. HAB. Eastern Province of United States (Southern region); Cuba, Costa Rica, and Panama R.R. Not recorded from Mexico or Guatemala. Accidental in New Brunswick (G. A. BOARDMAN in letter). Yucatan (LAWRENCE). This is one of the very handsomest of American Warblers, the yellow of the head and lower parts being of a pureness and mellowness scarcely approached by any other species. In a highly colored male from Southern Illinois (No. 10,111, Mississippi Bottom, Union Co., April 23; R. Kennicott) it is stained in spots, particularly over the eyes and on the neck, with a beautiful cadmium-orange. [Illustration: _Protonotaria citrea._ 7516] HABITS. In regard to the habits of this beautiful and interesting Warbler we receive but little light from the observations of older ornithological writers. Its geographical distribution is somewhat erratic and irregular. It does not appear to be distributed over a very wide range. It occurs as a migrant in the West Indies and in Central America. In the United States it is found in the Southern region, but farther west the range widens, and in the Mississippi Valley it is found as far north as Kansas, Southern and Central Illinois, and Missouri. Accidental specimens have been obtained as far to the northeast as Calais, though unknown to all the Eastern States as far south as Southern Virginia. It was met with by none of the government parties except by Dr. Woodhouse, who found it abundant in Texas.