154 



Cymwdis cayennensis Cuyiek, Reg. An. i, 1817, 319 ; il>. ed. 2, 331. — YiG. Zool. 

 Journ. i, 1S2-, 323, 337. — Stephens, Zool. siii, pt. 2, 18 — , 18. — Les&on, Man. i, 

 1828, 91; Tr. Orn. 1831, 55, pi. 13, fig. 2.— Lafresn. Mag. Zool. pi. 22.— 

 Kaup, Class. Siiug. u. Vog. 1844, 123.— Gray, Gen. B. 1845, 25 ; Hand List, 

 i, 1869, 27.— BoNAP. Consp. Av. i, 1850, 20.— V. D. Hoev. Handb. Dierk. 

 1855, 809.— Stsickl. Orn. Syu. i, 1855, 128.~Bukm. Th. Bras, ii, 1856, 107,— 

 Lawk. Ann. Lye. N. Y. 1861, p. — (New Granada) ; il. 1868, 134 (Gulf of 

 Nicoya, Costa Eica).— Schleg. Mns. Pavs-Bas, Pernes, 1862, 9 : Eev. Ace. 

 1873, 136.— Leot. Ois. Trinidad,' 1866, 34.— Sclater, P. Z. S. 1868, 629 

 (Venezuela).— SCL. & Salv. P. Z. S. 1870, 215 (Veragua); ih. 838, (coast 

 Honduras); Nom. Neotr. 1873, 122.— Fixsch, P. Z. S. 1870, p. — (Trinidad).— 

 Pelz. Orn. Bras. 1871, 5, 398.— Ridgw. Pr. Bost. Soc. N. H. 1873,53. 

 Asiur cayennenbis Spix, At. Bras, i, 1824, pi. 8c. 

 Buteo cayennensis Less. Man. Orn. i, 1828, 103. 



Odontfiorchis cayennensis Kavp, Class. Siiug. n. Vog. 1844, 124; Contr. Orii. 1850, 78. 

 Leptodon cayennensis Sharpe, Cat. Aee. B. M. 1874, 333. 

 Asturina cyanopus Vieill. Ene. Meth. iii, 1823, 1261. 

 Falco palliatus Max. in Tenim. PI. Col. i, 1823, pi. 204 (juv.); Beitr. iii, 1830, 148. 



Buteo paUiaths Less. Man. Orn. i, 1828, 103. 

 Cymindis iuleonides Less. Tr. Orn. 1831, 55. 

 Cayenne Falcon Lath. Syn. i, 1781, 59. 

 Fetit Juiour de CayenneBuFF. PI. Eul. i, 473. 



Sal), — Tropical America, ou the Atlantic side, from Brazil toMirador, 

 Mexico. West Indies ? (Shaepe). 



Wing, 11.25-13.C0; tail, 9.70-10.50; culmeu, 0.80-1.05; tarsus, 1.40-1.75; 

 middle toe, 1.50-1.75. Fourth, fifth, or sixth qiiill longest; first shorter 

 than the ninth. Lower parts usually entirely white, but sometimes with, 

 narrow dusky streaks on the breast and sides, and occasionally (in me- 

 lanistic young birds) with broad stripes or longitudinal spots of blackish 

 over entire lower surface. Above plain plumbeous, plumbeous-black, 

 brownish-black or blackish-brown (the latter color usually in the younger 

 stage and variegated with ochraceous,) the head usnall^^ lighter (generally 

 pale ash-gray or pure white), but sometimes (in those individuals which 

 are heavily striped beneath) almost wholly black. Tail broadly banded 

 with black and gray or black and brown. Adult : — Above very dark 

 bluish-plumbeous, approaching black anteriorly, with a faint reflection 

 of bottle-green in certain lights; remiges indistinctly banded with lighter 

 plumbeous. Head and neck plain fine bluish-plumbeous or pearl-gray, 

 darker on the pileum and fading into white on the throat. Beneath 

 entirely immaculate pure white. Tail deep black, narrowly tipped with 

 white, and crossed by three rather narrow bands of bluish-gra3^ Young. — 

 Light phase : — Above dusky brown, approaching black anteriorly, the 

 retniges indistinctly banded with dusky. Head and neck usually almost 

 wholly pure white, the pileum more or less spotted with blackish-brown. 

 Lower parts white. Tail brownish-gray or brownish-wliite, crossed by 

 three bands of black.* DarTc x^hase {Melanistic?) : — Upper parts as in 

 the last, but lower parts striped more or less broadly with blackish, 

 and the head and neck (except the throat) uniform blackish like the 

 back. 



A young specimen from Panama in Mr. Lawrence's collection, agree- 

 ing with stage III of the above diagnosis, calls to mind Temmiuck's PI. 

 Col. 270 ; but it is not so dark beneath as the plate referred to, has no 

 rufous on the nape, and has white streaks on the throat. 



*Auother phase (younger?) is similar, but the lesser -wing-coverts are much mixed 

 with white, and all the feathers of the upper parts are tipped with pale butf or fulvous. 

 The black bands of the tail only about half as wide as the interspaces, and the head 

 pure whit*, with only a few touches of dusky on the occiput. 



