ORDER ANSERES. 



[B 609, C 519, R 634, C 741.] 



HAB. North America in general, south to Cuba, Guatemala, and 

 Northern South America, breeding throughout most of its North Amer- 

 ican range. 



GENUS NOMONYX RIDGWAY. 



Nomonyx RIDGW. Pr. U. S. Nat. Mus. II. 1880, 15. Type, Anas 

 dominica LINN. 



[188.] Nomonyx dominicus (LINN.). 



Masked Duck. 



Anas dominica LINN. S. N. ed. 12, 1766, 201. 



Nomonyx dominicus RIDGW. Pr. U. S. Nat. Mus. II. 1880, 15. 



[B6io, C 5 2o, R6 3 5, C 742.] 



HAB. Tropical America ; accidental in Eastern North America 

 (Wisconsin ; Lake Champlain). 



SUBFAMILY ANSERINE. GEESE. 



GENUS CHEN BOIE. 

 Chen BOIE, Isis, 1822, 563. Type, Anser hyperboreus PALL. 



169. Chen hyperborea (PALL.). 



Lesser Snow Goose. 



Anser hyperboreus PALL. Spicil. Zool. VI. 1769, 25. 

 Chen hyperborea BOIE, Isis, 1822, 563. 



[B , C 480 rt, R 591 a, C 696.] 



HAB. Pacific coast to the Mississippi Valley, breeding in Alaska; 

 south in winter to Southern Illinois and Southern California. 



169 a. Chen hyperborea nivalis (FORST.). 



Greater Snow Goose. 



Anas nivalis FORSTER, Philos. Trans. LXII. 1772, 413. 



Chen hyperboreus nivalis RIDGW. Pr. Biol. Soc. Wash. II. 1884, 107. 



[B 563, C 480, R 591, C 695.] 



