Il8 CHECK-LIST OF NORTH AMERICAN BIRDS. 



144. Aix sponsa (LINN.). 



\Vood Duck. 



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

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



[B 5 S 7 , C 499 , R6i 3 , 719.] 

 HAB. Temperate North America, breeding throughout its range. 



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, 731. 



Netta rufina RIDGW. Pr. U. S. Nat. Mus. VIII. 1885, 355. 



[B , C , R , C 886.] 

 HAB. Eastern Hemisphere ; accidental in Eastern United States. 



GENUS AYTHYA BOIE. 



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

 LINN. 



146. Aythya americana (Evx.). 



Redhead. 



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

 Aythya americana BAIRD, B. N. Am. 1858, 793. 



[B 591, C 503, R6i8, C 7 2 3 .] 



HAB. North America, breeding from California and Maine north- 

 ward. 



147. Aythya vallisneria (WiLS.). 



Canvas-back. 



Anas -vallisncria WILSON, Am. Orn. VIII. 1814, 103. 

 Aythya -valisneria BOIE, Isis, 1826, 980. 



