FAMILY ANATID^:, DUCKS, GEESE, AND SWANS. 73 



Speculum, gray ; he.ul and neck, brownisli; chin and anterior portion of lores, brownish 

 white or whitisli (tcinale) ; resembles female Ked-head, but is smaller. 



Aiithya colhiria. Ring^necked Duck. 



s.'e xo. in:. 



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



under tail coverts, white; adult males have the tail featliers louy; and pointed. 



Clam/nhi hyemalis. Old Squaw. Long^tailed Duck. 



See Xo. 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 band of white (female). 



(rlancioneUa clangiila americann. Golden Eye. 

 See No. lOS. 



Glaucionetta clangula 

 anicricaiia. 



Head, black, glossed with green; speculum, white; l>ack, irrayish white, finely 

 lined with lilack (male). 



Aythyn marila. Greater Scaup Duck. Blue=bill or Black-head. 



See Xo. 1 (»."). 



Head, black, glossed with purple, finely lined with l)lack : speculum, white; back, 

 grayish whitr, -i:iallrr than the preceding spccirs, luil rescmblrs ii clK^cly (male). 



Aij/Jiya affinis. Lesser Scaup Duck. Blue^bill or Black=head. 



See Xo. inc.. 



Head, black, with violet or bluish gloss, a sjjot of white on the chin: speculum, 

 gray; liack, dull black (male). Aythyn r,,ii,tr>s. Ring-necked Duck. 



See Xo. in:. 



Section 3. Belly, not white. 



I'linnage, variously marked with white, slate-color, and chestnut; speculum. bliii<b; top 

 of head arxl wing coverts, not white finale). Jlistrionirits liisfrioninis. Harlequin Duck. 



Se.' Xo. 11-2. 



Top of head aud wing covt-rts. not white; plumage, dull brown, mottled on tbr under- 

 parls (female). Histritnn'nis histrituiinis. Harlequin Duck. 



See No. 11-2. 

 Top of head, wbilr; wing coveits, white; rum]i. Iiluish l)lack. 



EnU'nnPtta sli'llrri. Stellers' Duck. 

 Sr.- Xo. in. 



