FULIGULINiE. OIDEMIA. 181 
Velvet Duck. Black Duck. White-winged Black Duck. 
Double Scoter. Black Diver. 
Anas fusca, Linn. Syst. Nat. i. 196. — Anas fusca, Lath. 
Ind. Ornith. ii. 848. — Anas fusca, Temm. Man. d’Ornith. ii. 
854.— Oidemia fusca, Velvet Scoter, MacGillivray, Brit. 
Birds, v. 
256. Oidemia nigra. Black Scoter. 
Male with a hemispherical protuberance at the base above, 
the rounded lateral protuberances partially feathered ; both 
mandibles black, but the upper with part of the basal knob 
and the space including the nostrils yellow ; the feet dusky ; 
the plumage entirely black ; tail of sixteen feathers. Female 
with the bill dusky, its basal prominence less elevated ; the 
plumage blackish-brown above, greyish-brown beneath. Young 
like the female. 
Male, 19, 35. Female, 18, 34. 
This species is not uncommon on some parts of our coasts 
during winter. It is easily distinguished from the last by having 
no white on the wing. Its trachea differs in being destitute 
of the roundish flattened dilatation of the other species. 
Black Duck. 
Anas nigra, Linn. Syst. Nat. i. 196. — Anas nigra, Lath. 
Ind. Ornith. ii. 848. — -Anas nigra, Temm. Man. d’Ornith. ii. 
856. — Oidemia nigra, Black Scoter, MacGillivray, Brit. 
Birds, v. 
257. Oidemia perspicillata. Surf Scoter. 
Male with the bill having a gentle sloping protuberance in 
front, the very large lateral prominences bare, the upper man- 
dible with a nearly square black patch on each side at the 
base, margined with orange, unless anteriorly, where there is 
a bluish- white patch ; the prominent part over the nostrils 
reddish-orange, paler at the margins, the sides toward the 
end red, the unguis greyish-yellow ; the lower mandible flesh- 
coloured, with the unguis darker ; the tarsi and toes orange- 
red, the webs dusky ; the plumage deep black, glossed with 
blue ; a patch of white on the top of the head, and another 
on the hind-neck ; tail of fourteen feathers. Female with the 
bill greenish-black, its basal prominences less elevated ; the 
feet yellowish-orange ; the plumage brownish-black, darker 
on the top of the head, and upper parts of the body. 
Male, 20, 33, 9|, 1-J, 1 T 7 ^, 2, f %. Female, 19, 31. 
