792 
U. S. P. E. R EXP. AND SURVEYS ZOOLOGY — GENERAL REPORT 
speculum is white, edged behind by greenish black, the color, also, of the tertials. The white of the speculum goes across the 
middle of the secondaries. 
The female lias 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. 
Hah. — 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. 
Catal. 
No. 
Sex. 
Locality. 
When col- 
lected. 
Whence obtained. 
Collected by— 
Length. 
Stretch 
of wings. 
Wing. 
8.00 
1731 
316 
317 
936 
6901 
4456 
9869 
3 
3 
9 
Q 
Carlisle, Pa 
Oct. 29,1844 
April 28,1841 
April —,1841 
S. F. Baird 
16.82 
15.12 
16.25 
28.75 
26.50 
28.00 
7.40 
May 3,1843 
Nelson river, H. B. T 
Jno. Isbister 
Lieut Whipple 
FULIX COLLAKIS, Baird. 
Ring-necked Duck. 
.Unas collaris, Donovan, British Birds, VI, 1809 ; pi. cxlvii. (English sp.) 
Fuligula collaris, Bon. List, Birds Europe, 1842. 
Marila collaris, Bonap. Comptes Rendus, XLIII, Sept. 1856. 
Anas fuligula, Wils. Am. Orn. VIII, 1814, 66 ; pi. lxvi. Not of Linnaeus. 
• Anas (Fuligula) rufitorques, Bon. J. A. N. Sc. Ph. Ill, 1824, 381. 
Jlnas rufitorques, Ord, ed. Wils. VIII, 1825, 61. 
Fuligula rufitorques, Bon. Syn. 1828, 393.— Ib. List, 1838.— Sw. F. Bor. Am. II, 1831, 454.— Nuttall, Man. II, 
439.— Aud. Orn. Biog. Ill, 1835, 259 ; pi. 234.— 1b. Syn. 287— Ib. Birds Amor. VI, 1843, 
320 ; pi. 398.— Etton, Mon. Anat. 1838, 158.— Gosse, Birds Jam. 1847. 
Sp. Ch. — Bill blackish, with a basal and subterminal 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 bltek ; 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 head 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. 
Hab. — Whole of North America. Accidental in Europe. 
The bill of this species is more acutely pointed at the end than in F. marila. 
