Species and Races.
A. palumbarius. Wing, 12.00–14.50; tail, 9.50–12.75; culmen, .80–1.00; tarsus, 2.70–3.15; middle toe, 1.70–2.20. Fourth quill longest; first shortest. Adult. Above, continuously uniform slate-color, or brown; the tail with several more or less distinct broad bands of darker, and narrowly tipped with white. Beneath white, with transverse lines or bars of the same color as the upper surface. Top of the head blackish; a streaked whitish superciliary stripe. Young. Above much variegated with brown and pale ochraceous; bands on the tail more sharply defined. Beneath pale ochraceous, with longitudinal stripes of dark brown.
Adult. Above umber-brown, without conspicuously darker shaft-streaks; top of the head dull dusky. Markings on the lower parts in the form of sharply defined, broad, detached, crescentic bars, and of an umber tint; throat barred. Tail with five broad, well-defined bands of blackish. Wing, 12.25–14.25; tail, 9.40–11.10; culmen, .80–.95; tarsus, 2.80–3.15; middle toe, 1.80–2.20. Hab. Northern portions of the Old World … var. palumbarius.[83]
Adult. Above bluish slate-color, with conspicuous darker shaft-streaks; top of the head deep black; markings on the lower parts in the form of irregularly defined, narrow, zigzag bars, or fine lines, of a bluish-slaty tint; throat not barred. Tail with only about four indistinct bands of blackish. Wing, 12.00–14.70; tail, 9.50–12.75; culmen, .80–1.00; tarsus, 2.70–3.20; middle toe, 1.70–2.00. Hab. Northern portions of North America … var. atricapillus.
Astur palumbarius, var. atricapillus (Wils.).
AMERICAN GOSHAWK.
Falco atricapillus, Wils. Am. Orn. 1808, pl. lii, f. 3.—Bonap. Nouv. Giorn. Pisa, XXV, pt. ii, p. 55. Astur atricapillus, Bonap. Os. Cuv. Règ. An. p. 33.—Ib. List, 1838, 5; Consp. 31.—Wils. Am. Orn. II, 284.—Kaup, Monog. Falc. Jardine’s Contr. Orn. 1850, 66.—De Kay, Zoöl. N. Y. II, 19, pl. ii, fig. 4 (ad.), f. 5 (♂ juv.).—Nutt. Man. 85.—Strickl. Orn. Syn. I, 118.—Newb. P. R. Rep. VI, iv, 74.—Coop. & Suck. P. R. Rep. XII, ii, 144.—Lord, Pr. R. A. I. IV, 1860, 110.—Blakiston, Ibis, III, 1861, 316.—Gray, Hand List, I, 1869, 29.—Brewer, Oölogy, 1857, 17. Falco palumbarius, Sab. Frankl. Exp. 670.—Bonap. Ann. N. Y. Lyc. II, 28.—Aud. Edinb. J. Nat. Geog. Sc. III, 145.—Ib. B. Am. pl. cxli; Orn. Biog. II, 241.—Giraud, B. Long Isl’d, 18.—Peab. B. Mass. III, 77. Astur palumbarius, Sw. & Rich. F. B. A. II, pl. xxvi.—James. Wils. Am. Orn. I, 63.—Aud. Syn. B. Am. 18.—Brewer, Wils. Am. Orn. 685, pl. i, fig. 5.—Gray, List B. Brit. Mus. 63.
Sp. Char. Adult male (44,940, Boston, Mass.; E. A. Samuels). Above continuous bluish-slate, shafts of the feather inconspicuously black; tail darker and less bluish, tipped with white (about .25 of an inch wide) and crossed by five broad, faintly defined bars of blackish, these most distinct on inner webs (the first concealed by the upper coverts, the second partially so; the last, or subterminal one, which is about twice as broad as the rest, measuring about one inch in width). Primaries darker than the tail (but not approaching black). Forehead, crown, occiput, and ear-coverts pure plumbeous-black; feathers snowy-white beneath the surface, much exposed on the occiput; a broad conspicuous supraoral stripe originating above the posterior angle of the eye, running back over the ear-coverts to the occiput, pure white, with fine streaks of black; lores and cheeks grayish-white. Lower parts white; the whole surface (except throat and lower tail-coverts) covered with numerous narrow transverse bars of slate; on the breast these are much broken and irregular, forming fine transverse zigzags; posteriorly they are more regular, and about .10 of an inch wide, the white a very little more. Chin, throat, and cheeks without transverse bars, but with very sharp shaft-lines of black; breast, sides, and abdomen, a medial longitudinal broad streak of slate on each feather, the shaft black; on the tibiæ, where the transverse bars are narrower and more regular, the shaft-streaks are also finer; anal region finely barred; lower tail-coverts immaculate pure white. Lining of the wing barred more coarsely and irregularly than the breast; under surface of primaries with white prevailing, this growing more silvery toward the ends; longest (fourth) with six oblique transverse patches of slate, the outlines of which are much broken. Wing-formula, 4, 5, 3–6–2; 1=10. Wing, 13.00; tail, 9.50; tarsus, 3.70, naked portion, 1.35; middle toe, 2.00; inner, 1.21; outer, 1.37; posterior, 1.00.
No. 8,508 (Fort Steilacoom, Puget Sound, Washington Territory; Dr. Suckley. Var. striatulus, Ridgway). Similar to No. 44,940, but the upper surface more bluish, the shafts of the feathers more conspicuously black; the dorsal feathers nearly black around their borders. Tail-bands nearly obsolete. Lower parts with the ground-color fine bluish-ash, sprinkled transversely with innumerable zigzag dots of white, these gradually increasing in width posteriorly, where they take the form of irregular transverse bars; crissum sparsely and coarsely sprinkled with slaty. Each feather of the lower parts with a very sharply defined narrow shaft-stripe of deep black, these contrasting conspicuously with the bluish, finely marked ground-color. Under surface of primaries uniform slaty to their bases, the usual white spots being almost obsolete. Wing-formula, 4–5, 3–6–2–7–8–9, 1. Wing, 12.50; tail, 9.10; tarsus, 2.60, the naked portion, 1.40; middle toe, 1.75.
Adult female (12,239, Brooklyn, N. Y.; J. Ackhurst). Almost precisely similar to the male. Slate above less bluish; bands on tail more distinct, five dark ones (about .75 of an inch in width) across the brownish-slate; obscure light bands indicated on outer webs of primaries, corresponding with those on inner webs; lores more grayish than in male; bars beneath more regular; longitudinal streaks blacker and more sharply defined. Wing, 14.25; tail, 11.25; tarsus, 1.60–1.20; middle toe, 1.95; inner, 1.40; outer, 1.45; posterior, 1.30.
No. 59,892, (Colorado; F. V. Hayden, var. striatulus, Ridgway). Similar to male No. 8,508, described above, but differing as follows: interscapulars uniform with the rest of the upper surface; tail-bands appreciable, much broader than in ♀, No. 12,239, the subterminal one being 1.61, the rest 1.10, wide, instead of 1.10 and .70. The longest upper tail-coverts with narrow white tips; white spots on inner webs of primaries more distinct. Black shaft-streaks on lower surface broader and more conspicuous. Wing-formula, 4, 3, 5–6–2–7, 1=10. Wing, 14.70; tail, 11.50; tarsus, 2.50; the naked portion, 1.10; middle toe, 2.00.