ANATIN.E — THE DUCKS — IIAUELDA. 



57 



Char. Bill hihuU (much shorter than the tarsus), all its outlines tuperiiig rapidly to the eiul, 

 wliiili is occupietl cutiri'ly \>y the very large bruad nail ; lower eilye of the niuxilla nearly straight 

 lor the liasal half, then suiUlenly risin;^ to tlie iironiinently deeurved nail ; lamella) slightly exposed 

 alou},' the straigiit basal portion of the maxillary tomium ; featheriu},' at the base of the bill forming 

 ii nisirly straight oldi(|Ue line, advancing fartiiest forward on the forehead, and scarcely interru|)ted 

 liv any re-entrant angle, so prominent in most Ducks. Adult male with the longer 8aii)uLii'8 

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

 lengthened. 



H. hyemalis (winter i)ltimage). 



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

 uni([ue outline of the feathering at the base of the bill, this outline advancing gradually farther 

 I'orward from the rictus to the base of the culmen, the continuity of the slightly curved line inter- 

 rupted by oidy a very i'aint, sometimes scarcely perceptible, indentation at the place of the deep 

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

 toltvmus, which, however, has the bill and other features ve?"' different. 



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

 descending to lower latitudes in winter. 



Harelda hyemalis. 



THE LONO-TAILEO DUCK; OLD SQUAW. 



Jnas hyemitlis, Linn. S. N. ed. 10, I. 1758, 126 ; ed. 12, I. 1766, 202. 



Anas luciiwUs, BRtixN. Orn. Bor. 1764, 17. 



Anas ylacialis, LiXN. S. N. ed. 12, I. 1766, 203. — Wils. Am. Orn. VIII. 1814, 93, 96, pi. 70. 



Ilarelda, glacialis, " Leach," Stephens, Shaw's Gen. Zool. XII. ii. 1824, 17.0, pi. 58. — S\v. & Rich. 



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



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



— RiixiW. Nom. N. Am. B. 1881, no. 623. 

 Ftdigula {Harelda) glacialis, Nutt. Man. II. 1834, 453. 

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



379, pi. 410. 

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



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

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

 Platypus Fabcri, Bkehm, Lerb. Eur. Vbg. II. 1824, 1004. 

 Clangula Faben, meguaros, musica, brachyrhynchos, Buehm, 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 



