FAMILY ANATIDvE. DUCKS, GEESE, AND SWANS. 7,3 



Speculum, gray ; head and neck, brownish; chin and anterior portion of lores, brownish 

 white or whitish (female) ; resembles female Red-head, but is smaller. 



Aythya collari*. Ring-necked Duck. 

 See No. 107. 



A patch of white or grayish white on the head, including the eye; no speculum; 



under tail coverts, white; adult males have the tail feathers long and pointed. 



CIan</i(Ia hyemdlis. Old Squaw. Long- tailed Duck. 



See No. 111. 



Section 2. Belly, white, sometimes tinged on lower part 

 with dusky or gray ; no white or grayish white on head. 



Head, brown; a distinct wing baud of white (female). 



Glaucionetta clanfjula americana. Golden Eye. 

 See No. 108. 



Glaucionetta clangula 

 americana. 



Head, black, glossed with green; speculum, white; back, grayish white, finely 

 lined with black (male). 



Aythya marila. Greater Scaup Duck. Blue bill or Black head. 



See No. 105. 



Head, black, glossed with purple, finely lined with black; speculum, white; back, 

 grayish white, smaller than the preceding species, but resembles it closely (male). 



Aythya affinis. Lesser Scaup Duck. Blue hill or Black head. 



See No. 106. 



Head, black, with violet or bluish gloss, a spot of white on the chin; speculum, 

 gray; back, dull black (male). Aythya collaris. Ring-necked Duck. 



See No. 107. 



Section 3. Belly, not white. 



Plumage, variously marked with white, slate-color, and chestnut; speculum, bluish; top 

 of head and wing coverts, not white (male). Histrionicus histriontcus. Harlequin Duck. 



See No. 11-2. 



Top of head and wing coverts, not white ; plumage, dull brown, mottled on the under- 

 parts (female). Histrionicus histrionicus. Harlequin Duck. 



See No. 112. 

 Top of head, white ; wing coverts, white ; rump, bluish black. 



Eniconetta steUeri. Stellers' Duck. 

 See No. 114. 



