ORDER ANSERIFORMES. 41 



also occurs in summer on the Chukches Peninsula, Siberia. Winters over the 

 western United States, especially in California, east to the Mississippi Valley 

 and from southern British Columbia, Nevada, Utah, southern Colorado, and 

 southern Illinois south to the Gulf coast from Florida to Texas and central 

 Mexico. Casual in Ontario, Quebec and on the Atlantic coast (lower St. 

 Lawrence River, Rhode Island, New Jersey, Virginia, and North Carolina) : 

 also on the Asiatic coast, south to Japan. Accidental in the West Indies. 



Chen hyperborea atlantica Kennard. Greater Snow Goose. [169a.] 



Chen atlantica Kennard, Proc. New Engl. Zool. Club, IX, 93, Feb. 16, 

 1927. (Back Bay, Princess Anne County, Virginia.) 



Range. — Breeds at McCormick Bay, Greenland, and on north Baffin and 

 Ellesmere islands. Winters on the Atlantic coast of Maryland, Virginia, and 

 North Carolina, from Chesapeake Bay (sometimes Delaware Bay) to Core 

 Sound; northward along the Atlantic coast in migration. Accidental at Cape 

 Fullerton, Hudson Bay. 



Chen caerulescens (Linnaeus). Blue Goose. [169.1.] 



Anas cxrulescens Linnaeus, Syst. Nat., ed. 10, I, 1758, 124. Based on 

 the Blue-winged Goose Edwards, Nat. Hist. Birds, 152. (in Canada 

 = Hudson Bay.) 



Range. — Breeds in southwestern Baffin Island and Southampton Island. 

 Migrates through the Mississippi Valley and winters mainly on the coast of 

 Louisiana from the Mississippi to Vermilion Bay and in lesser numbers to 

 BrowTisville, Texas. Casual in Florida, the Bahamas, and Cuba; also occa- 

 sional in Quebec, Nebraska, Ohio, and California, and on the Atlantic coast 

 (Maine, Massachusetts, Maryland, Virginia, North Carolina, and South Caro- 

 lina). 



Subgenus EXANTHEMOPS Elliot. 



Excinthemops Elliot, New and Unfig. Birds N. Amer., II, Pt. ix, 1868, 

 pi. xliv and text. Type, by orig. desig., Anser rossii Cassin. 



Chen rossi (Cassin). Ross's Goose. [170.] 



Anser Rossii "Baird," Cassin, Proc. Acad. Nat. Sci. Phila., [XIII] 1861, 

 sig. 5-6, March-April [June 30], 73. (Great Slave Lake.) 



Range. — Breeding area not definitely known, probably in the region east of 

 Coronation Gulf. Winters in California (Sacramento and San Joaquin val- 

 leys, and formerly to Orange County); casually north to British Columbia. 

 In migration north-east through Montana and Alberta to the Athabaska- 

 Mackenzie region. Casual in Louisiana, Utah, North Dakota, Manitoba, 

 Colorado, Arizona, and Chihuahua. 



