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Show 94 grayish, three to sis in number, the last black band broadest and usually subterminal; tail sometimes ( in fresh plumages) with a terminal margin of white. Adult:- Above, uniform slate or plumbeous, growing darker on the pileum, which is sometimes black; occipital feathers pore white beneath the surface, and scapulars with large concealed spots of the same. Legs and feet yellow; lower parts extremely variable, usually with transverse markings of rufous or brown, rarely white, broken only by dusky shaft- streaks or narrow faint stripes on the breast and sides, and uniform rufous tibiae; sometimes entirely rufous, or uniform plumbeous, with rufous on the tibiae. Young:- Above, dark brown, the feathers with terminal margins of rusty brown or buff. Beneath, white or ochraceous, usually with longitudinal ( rarely with transverse) markings of brown- immaculate only in N. bicolor. Key to the species. A.- Black bands of the tail decidedly narrower than the gray interspaces. a. Size large ( wing, 8.25- 11.00; tail, 6.80- 10.50). * 1. N. COOPERI.- Wing, 8.70- 11.00; tail, 7.80- 10.50; culmen, 0.58 - 0.80; tarsus, 2.30- 2.85; middle toe, 1.45- 1.85. Tail with four black bands. Adult:- Beneath, white, with transverse spots or bars of rufous, except on throat and crissum. Young .-- Thighs variously marked with brown; breast, belly, and sides with stripes of the same. Hab.- North America, except Arctic region and West Indies. 2. N. GUTTATUS.- Wing, 8.50- 10.50; tail, 6.80- 8.50; culmen, 0.60; tarsus, 2,40- 2.65. Tail with four black bauds. Adult:- Beneath, pale " fawn- rufous"; the breast with white spots and half- bars; the thighs and lining of wing plain. Hab.- Paraguay and Bolivia. 3. X. CHILENSIS.- Wing, 8.25- 9.90; tail, 7.65- 8.50; culmen, 0.50- 0.70; tarsus, 2.25- 2.65; middle toe, 1.40- 1.70. Tail with five to six black bands. J. d « 7f:- Tibiie plain rich rufous; other lower parts, except crissum, ash- gray or umber, shaded with rufous and slate- color, and broken by white spots, these forming distinct bars on the abdomen. Young:- Below, buff, more rusty on the tibiae, the latter transversely spotted with rusty- brown; breast, . sides, and abdomen with lanceolate or ovate stripes of blackish. Hab.- Chile to Straits of Magellan. 4. N. GUOTLACHI.- Wing. 8.60- 10.50; tail, 7.50- 9.50; culmen, 0.68- 0.70; tarsus, 2.50- 2.75. Tail with four black bands. Adult :- Jugulum and sides of neck plain ash- gray; lower part of breast and upper portiou of abdomen plain rufous, the feathers narrowly margined with white; tibiie rufous, the feathers with subterminal darker bars and lighter tips. Young:- Sides and tibiae with broad transverse spots of brown ; breast and abdomen with broad stripes of the same; longer lower tail- coverts with narrow shaft- stripes of blackish. Hab.- Cuba. b. Siz3 small ( wing, 6.35- 8.80; tail, 5.50- 8.25). 5. N. FUSCTJS- Wing, 6.35- 8.80; tail, 5.50- 8.25; culmen, 0.35- 0.60: tarsus, 1.85- 2.30; middle toe, 1.10- 1.55. Tail with four to five black bands. Adult .-- Tibiae barred or spotted transversely with rufous and white; other lower parts, except throat and crissum, with wide bars or transverse spots of rufous and white. Young:- Tibiae white or pale rusty, with markings of brown of | variable shape; other lower parts, except crissum, with brown I stripes, more spot like on the sides. Hab.- Entire continent of | North America. ( Not in West Indies.) |