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



Speculum, gray ; head ami neck, IhowqUU; chin aud anteri.n- portion of lores, hrownish 

 wliite or wliitisli (female) ; resemliles female Ked-liead, hut is smaller. 



Aiiiluja ciilhtn's. Ring=necked Duck. 



See No. 107. 



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



umler tail coverts, white; adult males have the tail feathers Ion;.- and jiointed. 



Chini/nld hyemalis. Old Squaw. Long=tailed Duck. 



,Si>e No. 111. 



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

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



Head, hrown; a distinct wing band of wliite (female). 



Glaucionetta danr/ula ami'ricinia. Qolden Eye. 

 See No. 108. 



Glaucionetta cl.ingula 

 amerirana. 



Head, black, glossed with green; speculum, white; liiiek, i;\'.iyisli white, finely 

 lined with black (male). 



Aythija mariln. Greater Scaup Duck. Blue-bill or Black=head. 



See Nn. lO.o. 



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

 grayish wliite, smaller than the preceding;' sjiecies, but resembles it I'losely (male). 



Aijihyit iiffiidf!. Lesser Scaup Duck. Blue-bill or Black°head. 



See No. 100. 



Head, black, with violet or bluish gloss, .i sjiot of white on the chin ; speculum, 



gray; liack, dull black (^male). Aythya collarix. 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 (jnale). Ilisfrinninis histrioniriis. Harlequin Duck. 



See No. 112. 



Top of head and wing coverts, not Avliite ; ]ilum;ige, dull brown, mottled ou the uudi'r- 

 parts (female). Bisiriniiicvx liixtrimiinis. Harlequin Duck. 



See No. 112. 

 Top of head, white; wing coverts, white; runii), bluish bl.ick. 



EniriitiMUi slclleri. Stellers' Duck. 

 .See No. 114. 



