132 NORTH AMERICAN BIRDS. 



ochraceous, deepest laterally, the posterior portion usually with a few 

 longitudinal streaks of dusky. Hah. Tropical America, north to Mid- 

 dle Mexico. 



Falco communis, Gmel. 



Var. aiiatum, Bonap. 



AMERICAN PEREGRINE FALCON; DUCK HAWK. 



? Accipiter falco maculatus, Briss. Oru. I, 329. ? Falco ncevius, Gmel,. S. N. 1789, 271. 

 Falco commimis f, and F. communis r], Lath. Ind. Orn. p. 31. Falco communis, 

 CoUES, Key, 1872, 213, f. 141. Falco peregrinus, Ord. Wils. Am. Oru. 1808, pi. Ixvi. — 

 Sab. L. Trans. XII, 529. — Rich. Parry's 2d Voy. App. 342. — Ib. F. B. A. II, 1831, 

 23. — BoNAP. N. Y. Lye. II, 27. —Ib. Lsis, 1832, 1136; Consp. 1850, 23, No. 4. — 

 King, Voy. Beag. I, 1839, 532. —James. Wils. Am. Orn. 677, Synop. 1852, 683.— 

 Wedderb. Jard. Contr. to Orn. 1849, 81. — Woouh. Sitgr. Zuni, 1853, 60. — Giraud, 

 B. Long Island, 1844, 14. — Peale, U. S. Ex. Ex. 1848, 66. —Gray, Li.st B. Brit. Mus. 

 1841, 51. Falco anatum, Bonap. Eur. & N. Am. B. 1838, 4. — Ib. Rev. Zool. 1850, 

 484. — Bridg. Proc. Zool. Soc. pi. xi, 109. — Ib. Ann. N. H. XIII, 499. — Gosse, B. 

 Jam. 1847, 16. — Cass. B. Cal. & Tex. 1854, 86. — Ib. Birds N. Am. 1858, 7. — DeK.w, 

 Zool. N. Y. II, 13, pi. iii, f. 8. — Nutt. Man. 1833, 53. — Peab. B. Mass. 1841, 83. 

 — Striokl. Orn. Syn. I, 1855, 83. — Blakist. Ibis, III, 1861, 315. — March, Pr. Ac. 

 N. S. 1863, 304. Fcdco nigriceps, Ca.ss. B. Cal. & Tex. I, 1853, 87. — Ib. Birds N. 

 Am. 1858, 8. — Strickl. Orn. Syn. I, 85. — Coop. & Suckl. P. R. R. Rep't, Vll, ii, 

 1860, 142. — Gray, Hand List, I, 1869, 19, No. 166. — Sharpe, Ann. k Mag. N. H. 

 Falco orienialis, (Gm.) Gray, Hand List, I, 1869, 19, No. 165 (in part). ? Falco 

 cassini, Sharpe, Ann. & Mag. N. H. 



Sp. Char. AduU (^, 43,134, Fort Resolution, Brit. N. Am., June; J. Lockhart). 

 Upper parts dark bluish-plumbeous, approaching black anteriorly, but on rump and upper 

 tail-coverts becoming fine bluish plumbeous-ash. On the head and neck the continuous 

 plurabeous-black covers all the former except the chin and throat, and the back portion 

 of the latter; an invasion or indentation of the white of lower parts up behind the ear- 

 coverts separating that of the cheeks from tlie posterior black, throwing the former info 

 a prominent angular patch ; forehead and lores grayish. All the feathers above (posterior 

 to the nape) with transverse bars of plumbeous-black, these most .sharply defined 

 posteriori}^, where the plumbeous is lightest. Tail black, more plumbeous basally, very 

 faintly paler at tlie tip, and showing ten or eleven transverse narrow bands of plumbeous, 

 these most distinct anteriorly ; the bars are clearest on inner webs. Alula, pi-imary 

 and secondary coverts, secondaries and primaries, uniform plumbeous-black, narrowly 

 whitish on terminal margin, most observable on secondaries and inner priiuaries. Lower 

 parts white, tinged with delicate cream-color, this deepest on the abdomen ; sides and 

 tibiaj tinged with bluish. Chin, throat, and jugulum immaculate; the breast, however, 

 with faint longitudinal shaft-streaks of black; sides, flanks, and tibia3 distinctly barred 

 transversely with black, about four bars being on each feather; on the lower tail-coverts 

 they are narrower and more distant ; on the abdomen the markings are in the form of 

 circular spots ; anal region barred transversely. Lining of the wing (including all the 

 under coverts) white tinged with blue, and barred like the sides ; under surface of 

 primaries slaty, with elliptical spots or bars of creamy-white oh inner webs, twelve on 

 the longest. \Ving-formula, 2-1-3. Wing, 12.25 ; tail 6.00 ; tarsus, l.GO ; middle toe, 

 1.85; outer, 1.40; inner, 1.20; posterior, .80 ; culmen, .80. 



9 (13,077, Liberty Co., Georgia ; Professor J. L. Leconte). Like the male, but 

 ochraceous tinge beneath deeper ; no ashy wash ; bands on the tail more sharply defined. 

 about ten dark ones being indicated ; outer surface of primaries and secondaries with 



