of the United States. 305 



before the eye and auriculars, white ; tail cuneiform of four- 

 teen pointed feathers ; bill very slender, nail curved. 



Male bluish-slate, varied with black and white; eyebrows 

 and flanks rufous. 



Female uniform slatish-brown, belly whitish. 



Harlequin Duck, Anas histrionica, Wils. Am. Orn. viii. 

 pi. I39.pl. 12. jig. 4- 



Inhabits the Arctic regions of both continents, extending 

 but little to temperate countries : rare and accidental during 

 winter in the middle states. 



346. Fuligula glacialis, Nob. Mirror brown, subuniform 

 with the wing ; a whitish space around the eye ; tail cunei- 

 form, of fourteen pointed feathers. 



Male varied with black and white ; middle tail feathers 

 greatly elongated. 



Female sooty brown, beneath white ; crown blackish. 



Long-tailed Duck, Anas glacialis, Wils. Am. Orn. viii. 

 p. 93.pl. 70. Jig. l. male. p. 96. pi. 70 Jig. 2. female. 



Inhabits the Arctic regions of both continents, whence it 

 migrates periodically in winter : very common all along the 

 coasts of the union : found in temperate Europe, but rare 

 and accidental. 



75. MERGUS. 



Mergus, L. Gm. Lath. 111. Cuv. Temm. Vieill. Ranz. 

 Merganser, Briss. Mergus, Merganser, Steph. 



Bill moderate, straight, somewhat cylindrical, depressed 

 and broader than high at base, narrow, subulate, and somewhat 

 compressed at the point ; edges serrated, teeth inclined back- 

 ward, subulate, acute ; upper mandible hooked and unguicu- 

 lated at tip ; lower shorter, narrower, quite straight, obtuse : 

 nostrils submedial, lateral, longitudinal, very small, elliptic, 

 open, pervious, covered by a membrane: tongue thick, fleshy, 

 almost subulate, furnished above with hard, recurved papilla?. 

 Head moderate, somewhat compressed ; neck well propor- 



