792 



U. S. p. R. R EXP. AND SURVEYS — ZOOLOGY — GENERAL REPORT 



speculum is white, edged behind by greenish black, the color, al<o, of tJie tertials. The white of the speculum goes across the 

 middle of the secondaries. 



The female has the wing nearly similar ; the black replaced by brownish ; the region round the base of the bill whitish ; the 

 marbling or mottling almost entirely wanting. 



Length, 16.50 inches; wing, 8; tarsus, 1.34 ; commissure, 1.94. 



Hab. — Whole of North America. Accidental in Europe. 



This species is exceedingly similar to the F. marila, but is much smaller. The gloss of the 

 head is essentially purplish violet, occasionally changing to green, while that of the other is 

 green throughout in all lights. The sides and long feathers of the flanks appear much less 

 inclined to being banded with black, the best specimens showing only a slight obsolete sprinkling 

 of brown scarcely appreciable. This may, however, vary in both. The scapulars seem to be 

 more whitish in the small species, the black bands being fewer and more distant. The wings 

 appear much the same, although, as far as I can judge from the skins, there is less whitish on 

 the base of the primaries. 



List of specimens. 



FULIX COLLARIS, Baird. 



Ring-necked Duck. 



Anas collaris, Donovak, British Birds, VI, 1809 ; pi. cxlvii. (English sp.) 

 Fuligula collaris, Bon. List, Birds Europe, 1842. 

 Marila collaris, Eonap. Comptes Rendus, XLIII, Sept. 1856. 

 Anas fuligula, Wils. Am. Orn. VIII, 1814, 66 ; pi. l.tvi. Not of Linnaeus, 

 ^jios {Fuligula) rufitorques, Bon. J. A. N. Sc. Ph. Ill, 1824, 381. 

 Jlnas rvfitorquts, Oru, ed. Wils. VIII, 1825, Gl. 



Fuligula rufitirrques, Bon. Syn. 1828, 393.— Is. List, 1838.— Sw. F. Bor. Am. II, 1831, 454.— Nuttall, Man. II, 



439.— Ann. Orn. Biog. Ill, 1835, 259 ; pi. 234.— Ib. Syn. 287.— 1b. Birds Amer. VI, 1843, 



320 ; pi. 398.— Etton, Mon. Anat. 1838, 158.— Gosse, Birds Jam. 1847. 



Sp. Ch. — Bill blackish, with a basal and subterniinal bar of bluish white. Head, neck, and body all round anterior to the 



shoulders, back, and tail coverts, black; the head glossed with green above, on the sides with purplish violet; the back 



with greenish. Middle of neck with a narrow chestnut ring, scarcely continuous above. Under parts, and a space immediately 



anterior to the shoulder, white. Space anterior to the black of crissum, and the sides, very finely waved with black ; the 



scapulars very slightly sprinkled with dots of grayish. Wings plain grayish brown ; the speculum, consisting of the terminal 



half of most secondaries, grayish plumbeous ; the innermost of them tipped with white. Point of chin white. 



The female has the black replaced by brown ; the sides of the lioad and chin adjacent to the bill whitish ; a whitish ring 

 ound the eye. Wing as in the male. The basal whitish bar of the bill appears to be wanting. Length, 18 ; wing, 8 ; tarsus, 

 1.28 ; commissure 2.10. 



llah. — Whole of North America. Accidental in Europe. 



The bill of this species is more acutely pointed at the end than in F. marila. 



