TAMILV ANATID.i;. DUCKS, (iEESE, AND SWANS. 



71 



SUBFAMILY FULIQULIN/E. 

 Bay and Sea Ducks. 



Ducks having flap or membraneous lobe on 

 hind toe; tarsus, scutellate (transverse scales) in 

 front. 



^ Group I. Wing, from 5 to 6.50 inches long. 

 Section 1. Tail feathers, not stiff and pointed. 



Head, greenish purj)!!', with wliitc p.itfh (niiile) ; head, 

 •;rayi;*h brown with wldu- paltli i rcinalc or iinMiature) ; no 

 dark stript's on elieck ; hill, h-s^ than three fourths inch wide. 



Charitouftta aUicohi. Buffle=head Duck. Dipper Duck. 



See No. 110. 



Cli.Tritonctta albeola. 



Section 2. Tail feathers, stiff and pointed. 



'I'hi'oat. whitish; ehfcks, whitf or whitish: l)ili. hroad, three qnai'U'i's inch or more wide. 



E)ismatiirajinnaiff'n.^i.<. Ruddy Duck. 

 See No. 



Front of lu-ad, includiiii;' t'het'ks, hlack (adult); head with hlack stripes on sidf (female 

 or iinmaliirt'). Tropical ^^pecies accidental in the I'nited States. 



Nnmotvjx duminicus. Hasked Duck. 

 SeeXo. VIW. 



* Group 2. Wing, from 6.50 to 7.50 inches long. 

 Section I. Belly, white. 



Head, i^rct'iMsii jmiple, no while on head; hack, liarred 

 hl.ack and white; Speculum, white (ni.ile). 



Aijthijii iiffmis. Lesser Scaup Duck. Blue-bill. 



See No. 106. 

 Aythy.i ntlinis. 

 Head, 1)rownisli. a patch of dull white at base of hill : no white on ear coverts ; speculum, 

 white (female). Aythya affinis. Lesser Scaup Duck. Blue-bill. 



See No. 106. 



* For ilirections for iiicasiireineiit, see jiage 'J. 



