26 
Allen’s naturalist’s library. 
It has never been met with on the continent of Europe and 
appears to be only a straggler to Greenland. ' 
Range outside the British Islands. — This is a North American 
species, breeding from Labrador to Alaska, and occurring even 
on the Commander Islands ; migrating south in winter to 
Mexico and the Greater Antilles. 
Hahits.— Resemble those of the Golden-eye, even to the 
mode of nesting in the hole of a tree. Very little has been 
written about the species by the explorers in Alaska, but the 
stomach of a female bird shot in Minnesota by Mr. A. C. Stark 
was crammed with small red worms. The bird is alM known 
to be herbivorous, and to devour land and marine molluscs, 
shrimps, and leeches. Like the Golden-eyes, it is a first-rate' 
diver, and in the States it is often called the “ Butter-ball ” 
from its extreme fatness. ’ 
Nest.— Placed in the hole of a tree, and lined with down. 
Eggs. — From six to ten in number. 
THE LONG-TAILED DUCKS. GENUS IIARELDA. 
Hardda, Stephens, Gen. Zool. xii. part 2, p. 174 (1824). 
Type, H. gladalis (Linn.). 
The peculiar characters of this genus are the uniformly 
coloured primaries, which show no distinct “mirror,” the 
variegated nature of the plumage, the fully-crested head, and 
the long central tail-feathers. The edges of the upper man- 
dible are partly bent inwardly. 
I. THE LONG-TAILED DUCK. HARELDA GLACIALIS. 
Anas gladalis, Linn. Syst. Nat. i. p. 303 (1766). 
Harelda gladalis, Macg. Br. B. v. p. 192 (1852); Dresser, B. 
Eur. vi. p. 617, pis. 443, 444 (1875) ; B. O. U. List Br. 
B. p. 132 (1883); Saunders, ed. Yarr. Br. B. iv. p. 446 
(1885); id. Man. Br. B. p. 443 (1889); Lilford, Col. Fig. 
Br. B. part xxx. (1895) ; Salvad. Cat. B. Brit. Mus. xxvii. 
p. 389 (189s). 
Fuligula gladalis, Seebohm, Br. B. iii. p. 598 (1885). 
(Plate LX.) 
Adult Male. — General colour above black, the scapulars dove- 
