HISTRIONICUS. 107 
Genus HISTRIONICUS Lesson. (Page 86, pl. XXV., fig. 3.) 
Species. 
Adult male in winter : Lores and broad stripe on each side of crown, spot over 
ears, short stripe down each side of hind-neck, narrow collar round lower neck, 
broad bar across each side of breast, middle portion (longitudinally) of outer scap- 
ulars, greater part of tertials, spot near tip of greater wing-coverts, and spot at 
each side of base of tail, white ; broad stripe along each side of crown, together 
with entire sides and flanks, bright rufous; rest of plumage chiefly bluish plum- 
beous, deepening into blackish along the margins of the white markings; speculum 
dark metallic violet-blue. Adult male in summer: Colors very much duller than in 
the winter plumage, the pattern of which is imperfectly indicated; speculum dull 
dusky brownish gray with little metallic gloss; lower parts grayish white, spotted 
with grayish brown, the sides, flanks, and under tail-coverts nearly uniform gray- 
ish brown. Adult female: Much like the summer male, but the head, neck, and 
chest grayish brown, with a distinct white spot on the ear-covert region, and the 
fore part of the head (laterally) inclining to white. Young: Similar to the adult 
female, but browner and more uniform above, the chest, flanks, and under tail- 
coverts decidedly brownish. Length 15.00-17.50, wing 7.40-8.00, culmen 1.05-1.10, 
Liggs 2.30 X 1.62, buffy white or pale buff? (Identification doubtful.) Hab. North- 
ern portion of northern hemisphere; in America, south, in winter, to Middle States, 
Ohio Valley, and coast of California, breeding south to Newfoundland, northern 
Rocky Mountains, and the Sierra Nevada, as far as lat. 38°. 
155. H. histrionicus (Linn.). Harlequin Duck. 
Gmnus CAMPTOLAIMUS Garay. (Page 86, pl. XXV., fig. 2.) 
Species. 
Adult male: Head, neck, chest, scapulars, and wings (except quills) white; 
rest of plumage, including stripe on top of head and broad ring round neck, deep 
black; stiffened feathers of cheeks brownish white. Adult female: Uniform brown- 
ish gray, the wings more plumbeous; tertials silvery gray, edged with blackish ; 
secondaries white, primaries dusky. Young male: Similar to the adult female, but 
chin and throat white, and white chest of adult male strongly indicated ; greater 
wing-coverts white. Length about 18.00-23.75, wing 8.50-8.90, culmen 1.60-1.70, 
tarsus 1.50-1.60, middle toe 2.25-2.40. Hab. Formerly, northern Atlantic coast of 
North America, south, in winter, to Long Island, New Jersey, and the Great Lakes. 
Believed to be now nearly if not quite extinct. 
156. C. labradorius (GmzL.). Labrador Duck. 
Genus ENICONETTA Gray. (Page 86, pl. XXV., fig. 5.) 
Species. 
Adult male: Head and upper neck satiny white, the stiffened feathers of lores 
and short occipital tuft olive-green; space round eyes, chin, throat, lower neck (all 
