64. MERGANSER. 



471 



fi4. MERGANSER. 

 Merganser, /iriss. Om. vi n '>'^n I17m\ «- / ^ 



Prister, ^««e, i\ro,„. "if;,;; Hdn:Om. p'.SoO (isOO) ' 

 Br^^^^Sl^LSr"' ''°^^'^™ '"^^^' ^--tic Region, S.E, 



Typo. 



M. castor. 



M. castor. 

 M. brasilianus. 



Key to the Species. 



whtte ^'"''-""^''"^^ "^^ d"«ky 8-r«y edged with 



""■ tXe/wtte"' *'° "^^'^' ^^^" *^^ >-- 



"'■ "']'''")■', f "^,''"'1^ ''''"t*^ = ™^l''s with the 

 head black glossed with green; females 

 with the head rufous-brown, and throat 

 conspicuously white. 

 «'. No conspicuous black band across the 

 wing at the base of the greater wino-- 

 coverts. ° 



a\ Larger; culmen 2'20-2-40 inches: 

 leathers of the hind part of the head 

 very full, but not very long and not 

 torining a prominent crest ; head of 

 the females of a deep and brio-ht 

 cLGsttmt ^ 

 h\ Smaller; culmen'l-oblo-io :' feather's '"'*"''' ^" ^'^^■ 

 of the hind part of the head rather 

 thin and long, and forming decidedly 

 a prominent crest; liead of the female 

 ot a dull and pale rufous, and with 

 the antenor part of the crown tin"-ed 

 ■with greyish .. . ° 

 b\ A conspicuous black band 'acVo'ss " the '' ^^ ^'''- 



wmg, at the base of the greater win^- 

 coverts . . ^ . 



b\ Feathers of the' sides 'and flanks with con! '"'''"''"'''"'' ?• ^'^^ 

 spicuous crescentic bands ; head above 

 brown-rufou.s, sides of the head and 

 tliroat paler; occipital crest very lono- 

 {male immature?) ^ ° 

 b". Adistinct whitecollar round VhVn^ck ddine; ^'^"«'«"^"*' P" ^'^^ 

 the black of the upper part from the reddish 

 breast, which ,s streaked with dusky 

 flanks waved with black and whitish zL' 

 zag hues ; head and upper part of the neck 

 black with a green gloss {males) ; throat of 

 the female not white but rufescent ,,,,„,„, 4^9 



