Vol. XX 

 1903 



"I T'velfth Supplement to the A. O. U. Check-list. 3^5, 



Geog. Dist. — Western United States, east to the Rocky- 

 Mountains ; south in winter to central and western Mexico. 

 (QC Brewster, Bull. Mus. Comp. Z06I., XLI, 1902. 174; Ridg- 

 WAY, Manual N. A. Birds, 1896, 472.) 



Genus HELMITHERUS Rafinesque. This name is cor- 

 rected to Helmitheros, to agree with the original spelling. 



656.1. Dendroica nigrifrons Brewster. This has been 

 shown to intergrade with D. auduhoni {Cf. Ridgway, Bull. 

 U. S. Nat. Mus., No. 50, pt. II, 1902, 555) ; hence 



656«. Dendroica auduboni nigrifrons (Brewster). 



Dendroica nigrifrons Brewster, Auk, XVI, April, 1899, 94. 



Dendroica auduboni nigrifrons Ridgway, Bull. U. S. Nat. 

 Mus., No. 50, pt. II, 1902, 555. 



681e. Geothlypis trichas sinuosa J. Grinnell. 

 Salt Marsh Yellow-throat. 



Geothlypis trichas sinuosa Grinnell, Condor, III, May, 1901,. 

 65. 



[B-, C— , R-, C— .] 



Geog. Dist. — Salt marshes of San Francisco Bay, California. 

 {Cf Ridgway, Bull. U. S. Nat. Mus., No. 50, pt. II, 1902, 672.) 



682.1. Geothlypis poliocephala ralphi Ridgway. This 

 becomes 



682.1. Geothlypis poliocephala Baird, 

 Rio Grande Yellow-throat. 



Geothlypis poliocephala Baird, Review Am. Birds, 1865, 225. 



[B— C- R— , C— .] 



Geog. Dist. — Lower Rio Grande Valley, in Texas, south into 

 Mexico (Morelos, Michoacan, Sinaloa, etc.). 



