ORDER ANSERIFORMES. 59 



Subfamily ERISMATURINAE Ruddy and Masked Ducks. 



Genus ERISMATURA Bonapakte. 



Erismatura Bonaparte, Giornale Arcadico, LII, 1832, 208. Type, by 

 monotypy, Anas rubidus Wilson. 



Erismatura jamaicensis rubida (Wilson). Ruddy Duck. [167.] 



A7ias rubidus Wilson, Amer. Orn., VIII, 1814, 128 (pi. 71, figs. 5, 6). 

 (Delaware River, near Philadelphia.) 



Range. — Breeds from central British Columbia, Alberta, and northern 

 Manitoba to western Minnesota, southeastern Wisconsin, southeastern 

 Michigan, northern Illinois, northern Iowa, central Texas, northern New 

 Mexico, central Arizona, and northern Lower California; reported to have bred 

 sporadically in Ungava, Maine, Massachusetts (Cape Cod), Rhode Island, 

 and central New York, and breeding colonies have been found in southern 

 Lower California, the Valley of Mexico, and Guatemala. Winters on the 

 Atlantic coast from Chesapeake Bay (more rarely from Massachusetts) to 

 Florida, the Bahamas, and West Indies, on the Pacific coast from southern 

 British Columbia to Lower California, Guatemala, and Costa Rica, and in the 

 interior from central Arizona, southern Illinois, and western Pennsylvania 

 southward. Casual or accidental in Bermuda, Nova Scotia, New Brunswick, 

 and Alaska. [A closely allied race occurs in Porto Rico, Haiti, and Jamaica.] 



Genus NOMONYX Ridgway. 



Nomonyx Ridgway, Proc. U. S. Nat. Mus., Ill, 1880, 15 [March 27]. 

 Type, by orig. desig.. Anas dominica Linnaeus. 



Nomonyx dominicus (Linnaeus). Masked Duck. [168.] 



Anas dominica Linnaeus, Syst. Nat., ed. 12, I, 1766, 201. Based mainly 

 on La Sarcelle de S. Domingue, Querquedula Doniinicensis Brisson, 

 Orn., VI, 472. (in America meridionali = Santo Domingo.) 



Range. — Breeds and is apparently resident in the West Indies and eastern 

 South America to Argentina; has also occurred and may breed in Chile, Peru, 

 Bolivia, Ecuador, Panama, Guatemala, Costa Rica, Mexico, and at Browns- 

 ville, Texas. Accidental in Maryland, Massachusetts, Vermont, and Wis- 

 consin. 



Subfamily MERGINAE. Mergansers. 



Genus LOPHODYTES Reichenbach. 



Lophodytes Reichenbach, Avium Syst. Nat., 1852 [1853], ix. Type, by 

 orig. desig., Mergus cucullatus Linnaeus. 



