52 CHECK-LIST OF NORTH AMERICAN BIRDS. 



GENUS AIX BOIE. 

 Aix BOIE, Isis, 1828, 329. Type, Anas sponsa LINN. 



144. Aix sponsa (LINN.). 

 Wood Duck. 



Anas sponsa LINN. S. N. ed. 10, I. 1758, 128. 

 Aix sponsa BONAP. Comp. List, 1838, 57. 



[B 587, C 499, R 613, C 719.] 



GEOG. DIST. Temperate North America, breeding throughout its 

 range. Cuba. Accidental in Europe. 



SUBFAMILY FULIGULIN^I. SEA DUCKS. 



GENUS NETTA KAUP. 



Netta KAUP, Sk. Ent. Europ. Thierw. 1829, 102. Type, Anas 

 rufina PALL. 



[145.] Netta rufina (PALL.). 



Rufous-crested Duck. 



Anas rufina PALL. It. II. App. 1773, 713. 



Netta rufina KAUP, Sk. Ent. Europ. Thierw. 1829, 102. 



[B , C , R , C 886.] 



GEOG. DIST. Eastern hemisphere ; accidental in eastern United 

 States. 



GENUS AYTHYA BOIE. 



Ay thy a BOIE, Isis, 1822, 564. Type, by elimination, Anas ferina 

 LINN. 



146. Ay thy a americana (Evx.). 



Redhead. 



Fuligula americana EYTON, Monogr. Anat. 1838, 155. 

 Ay thy a americana BAIRD, B. N. Am. 1858, 793. 



