256 CHECK-LIST OF NORTH AMERICAN BIRDS. 



c. Passerculus rostratus sanctorum RIDGWAY. San Benito Sparrow. [544c.] 



Passerculus sanctorum RIDGWAY, Proc. U. S. Nat. Mus., V, 1883, 538. 

 (San Benito Island, Lower California.) 



RANGE. San Benito Island, Lower California ; south in winter to the Cape 

 Region. 



GENUS AMMODRAMUS SWAINSON. 



Ammodramus SWAINSON, Philos. Mag., N. S., I, June, 1827, 435. Type, 

 by monotypy, Ammodramus bimaculatus SWAINSON. 



SUBGENUS CENTRONYX BAIRD. 



Centronyx BAIRD, Rep. Expl. & Surv. R. R. Pac., IX, 1858, 440. Type, 

 by monotypy, Emberiza bairdii AUDUBON. 



Ammodramus bairdi (AUDUBON). Baird's Sparrow. [545.] 



Emberiza bairdii AUDUBON, Birds Amer., VII, 1844, 359, pi. 500. (East- 

 ern Montana, near Old Fort Union, North Dakota.) 



RANGE. Great Plains region. Breeds mainly in Transition 

 Zone from southwestern Saskatchewan and southwestern Keewatin 

 to central Montana, central North Dakota, and northwestern Minne- 

 sota; migrates through Arizona and New Mexico and winters from 

 central Texas to Chihuahua and northern Sonora; accidental on Long 

 Island, N. Y. 



SUBGENUS AMMODRAMUS SWAINSON. 



Ammodramus savannarum (GMELIN). 



RANGE. United States south to the West Indies, Central America, 

 and northern South America. 



a. [Ammodramus savannarum savannarum. Extralimital.] 



b. Ammodramus savannarum australis MAYNARD. Grasshopper Sparrow. 



[546.] 



Ammodromus australis MAYNARD, Amer. Exch. and Mart, III, 1887, 33. 

 (Nassau, New Providence, Bahamas.) 



