IT 6 



REVIEW OF AMERICAN BIRDS. 



[part I. 



Med. for 1853, 1854, 82 (Greenland).— BeeWer, Pf. Bost. Soe. N. H. 



VI, 1856, 4 (nest and eggs).— Belinaia rub. AvB. B. A. II, pi. 



113.— Helmitherus rub. BoN.— ScL. P. Z. S. 1856, 291 (Cordova) ; 



1859, 363 (^S.a,\a,Tpa). —Helminthophaga rub. Cab.— Sclater, P. Z. S. 



1858, 298 (Uaxaoa; Feb. and Aug.) .—Mniotilta rub. Keinhakdt, 



Ibis, 1861, 6 (Greenland). 

 Sylvia leucogastra, Shaw, Gen. Zool. X, ii, 1817, 622. 

 "Sijlvia nashvillei," Vieillot. — Gray. — Sylvia mexicana, Holboll. 



Hab. Eastern province of N. America, north to line of British America ; 

 Greenland ; south to Mexico ; not In West Indies. Recorded from Xalapa, 

 Cordova, Orizaba, and Oaxaoa, Mex. 



Helmintliophaga celata. 



Sylvia celata, Sat, Long's Exp. R. Mts. 1, 1823, 169. — Bou. Am. Orn. I, 

 pi. T, fig. 2.— AuD. Orn. Biog. II, pi. 178. — Sylvicola eel. Rich. — 

 Vermivora eel. Jaed. — Hdinaia eel. Aun. B. A. II, pi. 112. — Helmi- 

 therus eel. Bon.— SoLATEE, P. Z. S. 1857, 212 (Orizaba).— .ffeZmtn- 

 thophaga eel. Bated, Birds N. Am. 1858, 257. — Sclater, P. Z. S. 

 1858, 298 (Oaxaoa ; December) ; 1859, 373 ; 1862, 19 (La Parada). 

 —Cooper & Scckley, P. R. R. XII, ii, 1859, 178.— Lord, Pr. R. Art. 

 Inst. Woolwich, IV, 1864, 115 (N. W. Boundary). 



Sab. Middle and western provinces of N. America : Youkon and McKenzie 

 River dist. Very rare in the eastern Province of U. S. ; Cape St. Lucas ; 

 western Mexico in winter. 



On comparing extensive series of specimens from the Pacific coast 

 (including Cape St. Lucas), and those from the interior of North 

 America, including Arizona, Utah, Rocky Mountains, Tamaulipas, 

 and the Hudson Bay territories, I find that the former are of a much 

 brighter and clearer yellowish beneath and olivaceous above than 

 the latter. In all these there is much gray mixed with the yellow- 

 ish tints, clouding and obscuring them — sometimes very considerably. 

 The concealed orange-brown patch of the crown is also more re- 

 stricted in extent. These differences correspond with those of ma- 

 turity of plumage, tut even winter and young specimens from the 

 Pacific coast are more brightly colored than the others in spring. 



