COSMONETTAHA RELDA 625 



Like its allies it is an expert diver and can remain a con- 

 siderable time below the surface. It flies swiftly, usually not 

 high above the surface of the water, and if alarmed will dive at 

 once from the air into the water. In winter it feeds on small 

 mollusca which it obtains by diving, but in summer chiefly 

 on aquatic insects and their larvae. Its nest is placed on the 

 ground close to some swift-flowing stream, and is most carefully 

 concealed. The eggs 8 to 10 in number, are usually deposited 

 in June or early in July, and are rich cream-coloured, smooth 

 in texture of shell, and measure about 2*32 by 1'45. 



HARELDA, Steph., 1824. 



866. LONG-TAILED DUCK. 

 HARELDA GLACIALIS. 



Harelda glacialis (Linn.), Syst. Nat. i. p. 203 (1766) ; (Naum.), xii. 

 p. 210, Taf. 319 ; (Hewitson), ii. p. 431, pi. cxviii. fig. 1 ; Gould, B. 

 of E. v. pi. 382 ; id. B. of Gt. Brit, v. pi. 33 ; Dresser, vi. p. 617, 

 pis. 443, 444 ; (Audub.), B. Am. vi. p. 379, pi. 410 ; Salvadori, Cat, 

 B. Br. Mus. xxvii. p. 389 ; Tacz. F. O. Sib. 0. p. 1179 ; Saunders, 

 p. 455 ; Lilford, vii. p. 119, pi. 50 ; A. hyemalis, Linn. Syst. Nat. 

 i. p. 202 (1766) ; (Ridgway) ; p. 106. . 



Harelde ylaciale, French ; Moretta codona, Ital. ; Eisente, 

 Crerman ; Ijseend, Dutch ; Havlit, Dan. ; Isand, Norweg. ; Alfogel, 

 .Swed. ; Aglek, Greenl. ; Havelli, Icel. ; Alii, Finn. ; Vostroh-vostka, 

 Polyarnoi-nyrolt, Russ. 



$ ad. (New Brunswick). Forehead and sides of head ashy grey, browner 

 round the eye ; a long brown patch on the sides of the neck, becoming 

 chestnut-red below ; rest of head, neck, upper breast, back, and scapulars 

 white ; sides of and lower back, rump, upper tail-coverts, and elongated 

 middle tail-feathers black ; rest of tail white ; wing-coverts, primaries, and 

 lower breast brownish black, secondaries washed with chestnut ; abdomen 

 white ; bill blackish plumbeous, with a band of pinkish orange ; legs 

 plumbeous ; iris reddish brown. Culmen 1*2, wing 9'0, tail 8'0, the middle- 

 feathers 5-0 longer than the rest, tarsus 1*4 inch. The female has the crown 

 and nape blackish brown, becoming greyish on the hind-neck ; upper parts 

 blackish, the scapulars ashy brown with darker centres ; middle tail-feathers 

 not elongated ; sides of head dull white ; chin and a patch down the sides 

 of the neck brown; throat washed with dull brown; a broad blackish 

 brown band across the upper breast ; under parts otherwise white. In the 

 summer the male has the forepart of the head sooty grey, the rest of the 

 head, neck, and breast black ; upper parts black margined with rusty-red ; 

 under parts white. 



