kl-YKS AND WILLIAMS lilRDS OF IOWA. 117 



Subgenus MERECA Stephens. 



[B 585, R 607, C 713, U 1 37-] 

 Anas americana Gmel. Baldpate. Migratory; common. Has 

 not been observed during the summer. 



Subgenus NETTIOX Kaup. 

 [B579, R612, C 715. U 1 39-] 

 Anas carolinensis Gmelin. Green -winged Teal. Abundant mi- 

 grant. Breeds about the grassy marshes. 



Subgenus QUERQUEDULA Stephens. 

 [B 581, R 609, C 716, U 140.] 

 Anas discors Linn. Blue-winged Teal. Abundant spring and fall 

 migrant; and common summer resident, breeding in the "sloughs." 



Genus SPATULA Boie. 



[B 583, R 60S, C 718, U 142.] 

 Spatula clypeata (Linn.). Shoveller. Migratory; rather common. 

 Has not yet been observed breeding within the limits of the State. 



Genus DAFILA Stephens. 



[B 578, R 605, C 710, U 143.I 



Dahla acuta (Linn.). Pintail. Spring and fall migrant; abundant. 



Appears the second week in March, and remains until the middle of 



April, returning again in October. Very large flocks are not unfre- 



quently seen about the open ponds on the prairies. 



t .1 MS AIX Boie. 



[B 587, R 613, C 719, U 144. 1 

 Aix sponsa (Linn.). Wood Duck. Abundant migrant and rather 

 common summer resident, especially in the northern part of the State 

 where it frequents the wooded watercourses. 



Genus AYTHYA Boie. 

 [13 591, R 618, C 723, U 146.] 

 Aythya americana (EytA Red-head. Spring and fall migrant; 

 abundant, though in some localities it does not appear to be common. 



[B 592, R 617, C 724, U 147.] 

 Aythya vallisneria (Wils.). Canvas-back. Not as abundant as the 

 last species, but rather common. 



Subgenus FULIGULA Stephens. 

 [B 588, R 614, C 720, U 148.] 



Aythya mat ila nearctica Stejn. American Scaup Duck. Migratory; 

 not common. 



