ANATIN^ — THE DUCKS — HARELDA. 67 



Char. Bill small (much shorter than the tarsus), all its outlines tapering rapidly to the end, 

 which is occupied entirely by tlie very large Ijroad nail ; lower edge of tiie maxilla nearly straight 

 for the basal half, then suiklenly rising to the prominently decurved nail ; lamellaj slightly exposed 

 along the straight basal portion of the maxillary tomium ; feathering at the base of the bill forming 

 a nearly straight oblique line, advancing farthest forward on the forehead, and scarcely interrupted 

 by any re-entrant angle, so prominent in most Ducks. Adult male with the longer scapulars 

 elongated and lanceolate, the rectrices (14 in number) acute, the middle pair slender and greatly 

 lenutheued. 



H. hyevialis (winter plumarje). 



The most important peculiarity of structure in this well-marked genus consists in the almost 

 unique outline of the feathering at the base of the bill, this outline advancing gradually farther 

 forward from the rictus to the base of the culmen, the continuity of the slightly curved line inter- 

 rupted by only a very faint, sometimes scarcely perceptible, indentation at the place of the deep 

 angle seen in most Ducks. The only other genus showing an approach to this character is Camp- 

 tolwmus, which, however, has the bill and other features very different. 



But a single species is known, which, like Ilistrionicus, is circumpolar in its distribution, but 

 descending to lower latitudes in winter. 



Harelda hyemalis. 



THE LONG-TAILED DUCK; OLD SQUAW. 



Anas hyemalis, Linn. S. N. ed. 10, I. 1758, 126 ; ed. 12, I. 1766, 202. 



Anas hiemalis, BuiJNN. Orn. Bor. 1764, 17. 



Anas glacialis, Linn. S. N. ed. 12, L 1766, 203. — Wils. Am. Orn. VIIL 1814, 93, 96, pi. 70. 



Harelda glacialis, " Leach," Stephens, Shaw's Gen. Zool. XIL ii. 1824, 175, pi. 58. — Sw. & Rich. 



F. B. A. IL 1831, 460. — Baird, B. N. Am. 1858, 800; Cat. N. Am. B. 1859, no. 597.— 



CotTES, Key, 1872, 291 ; Check List, 1873, no. 508 ; 2d ed. 1882, no. 728 ; B. i^. W. 1874, 579. 



— RiDGW. Norn. N. Am. B. 1881, no. 623. 

 F2iligula (Harelda) glacialis, Nutt. Man. II. 1834, 453. 

 Fuligula glacialis, AuD. Orn. Biog. IV. 1838, 403, pi. 312 ; Synop. 1839, 295 ; B. Am. VI. 1843, 



379, pi. 410. 

 Anas miclonia, Bodd. Tabl. P. E. 1783, 58. 



Anas longicauda. Leach, Syst.Cat. Mam. and Birds, Brit. Mus. 1816, 37. 

 Anas hrachyrhynclios, Beseke, Vog. Kurl. 1792, 50. 

 Platypus Faberi, Brehm, Lerb. Eur. Vog. II. 1824, 1004. 

 Clangula Faberi, meguaros, musica, brachyrhynchos, Brehm, V. D. 1831, 935, 936, 937, 938. 



Hab. Northern hemisphere ; in America, south to the Potomac River and the Ohio ; chiefly 

 littoral. 



VOL. II. — 8 



