256 CHECK-LIST OF NORTH AMERICAN BIRDS. 



c. Fasserculus rostratus sanctdrum Ridowat. San Benito Sparrow. [544c.3 



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 



Genus AMMODRAMUS Swainson. 



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

 by monotypy, Ammodramus bimacidatus 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 AvBVBONjBivds Amer., VII, 1844,359, pi. 500. (East- 

 em 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 AlVIMODRAJVnTS Swainson. 



Ammodramus savamiSrum (Gmelin). 



Range. — United States south to the West Indies, Central America, 

 and northern South America. 



a. [Ammodramus savannarum savannanim. Extralimital.] 



b. Ammodramus savannarum austrdlis Maynard. Grasshopper Sparrow. 



[546.] 



Ammodramus australis Maynard, Amer. Exch. and Mart, III, 1887, 33. 

 (Nassau, New Providence, Bahamas.) 



