90 NORTH AMERTC.IX BIRDS. 



Genus MERGUS Linn/eus. (Page 84.) 

 Species. 



Adult male: Prevailing color pure white, but this relieved as follows: A patch 

 covering lores and narrowlj' surrounding eyes, deep black with a greenish reflec- 

 tion ; under portion of crest glossy greenish black ; back, rump, some of the wing- 

 coverts, secondaries, and two narrow crescentic bars across sides of chest, deep 

 black ; upper tail-coverts and tail ash-graj- ; length about 16.50, wing 7.75, eulmcn 

 1.10. Adult female : Upper part of head, including lores, reddish brown ; rest of 

 head, with neck (except behind), and lower parts, white; upper parts, sides, and 

 flanks ash-gray, darker on back ; chest tinged with pale ashy ; smaller than the 

 male, and crest less developed. Downy young : " Upper parts, including sides of the 

 head below the ej-e, but only on the back of the neck, dark blackish brown, darkest 

 on the crown and the lower part of the back ; at the base of the wing-joint a white 

 spot, and another close to it, but rather lower down the back, and on each side of 

 the rump another white spot ; below the eye a very small white spot ; underparts 

 white ; breasts and flanks pale grayish or soot}- brown." (Dresser.) JIab. Europe, 

 etc. ; accidental or occasional in eastern North America (?). 



M. albe'.lus LiNX. Smew.' 



Genus ANAS Linn.eus. (Page 84, pi. XXII., figs. 2-5 ; pi. XXIII., fig. 1.) 



Species. 



a\ Culmen longer than middle toe, without claw. 



b\ Width of upper mandible near tip more than one-third the commissure, the 

 upper and lower outlines of maxilla more or less convex for terminal 

 half, 

 c'. Wing more than 8.00 ; scapulars ami larger tortials broad, and without 

 light-colored median stripes in adult male. (Subgenus Anas.) 

 d'. Smaller wing-coverts uniform grayish brown or brownish slate; 

 tertials without light edgings; sexes very different in plumage; 

 wing with two distinct white bands. 



Adult male : Ilead and neck soft, brilliant metallic green ; 

 chest rich dark chestnut, separated from green of nock by 

 a collar of pure white; speculum rich metallic violet, bor- 

 dered anteriorlj' by a black bar, this preceded bj* a white 

 bar, and posteriorly by a black subterminal and white 

 terminal band. Adult female (and male in breeding season): 

 Wings as above ; elsewhere varied with duskj' and ochra- 

 ceous or buffy, the former on central or median portion of 

 the feathers, and predominating on upper parts, the latter 

 on edges, and prevailing on lower parts. Downy young : 



• JtfcrjM* atOcllui LiNX., S. N. cJ. 10, i. 175S, 129. 



