Vol, XX 
Ten Twelfth Supplement to the A, O. U. Check-Tist. 355 
Groc. Dist.— Western United States, east to the Rocky 
Mountains; south in winter to central and western Mexico, 
(Cf Brewster, Bull. Mus. Comp. Zoél., XLI, 1902, 174; Rinc- 
way, Manual N., A. Birds, 1896, 472.) 
Genus HELMITHERUS Ravinesour. This name is cor- 
rected to Helmitheros, to agree with the original spelling. 
656.1. Dendroica nigrifrons Brewsrrr. ‘This has been 
shown to intergrade with D. auduboni (Ch Ripaway, Bull. 
U.S, Nat. Mus., No. 50, pt. II, 1902, 555); hence 
6560. Dendroica auduboni nigrifrons (Brewstyr). 
Dendroica nigrifrons Brewster, Auk, XVI, April, 1899, 94. 
Dendroica auduboni nigrifrons Rivoway, Bull. U. S, Nat. 
Mus., No. 50, pt. II, 1902, 555. 
6Sle, Geothlypis trichas sinuosa J. Grinne. 
Salt Marsh Yellow-throat. 
Geothlypis trichas sinuosa GRINNELA, Condor, III, May, 1901, 
65. 
ey Omer Ree, Cr] 
Groc, Dist.— Salt marshes of San Francisco Bay, California. 
(Cf, Ripeway, Bull. U. S. Nat. Mus., No. 50, pt. II, 1902; 672.) 
682.1. Geothlypis poliocephala ralphi Ripcway. ‘This 
becomes 
682.1. Geothlypis poliocephala Bairn. 
Rio Grande Yellow-throat. 
Geothiypis poliocephala Bairv, Review Am. Birds, 1865, 226, 
[B— c—, R—, ¢ —) 
Groc. Dist.— Lower Rio Grande Valley, in ‘Texas, south into 
Mexico (Morelos, Michoacan, Sinaloa, etc.) 
