668 BULLETIN 5 0, UNITED STATES NATIONAL MUSEUM 



anatum — almost white to buffy white; under tail coverts very broadly 

 banded with chaetura black, the pale interspaces narrower than the 

 dark bands. 



Natal down. — Unknown. 



Adult male.— Wmg 305-340 (329); tail 158-161 (159); culmen from 

 cere 50-52 (50.7); tarsus 46-52 (49.1); middle toe without claw 47-49 

 (48 mm.).''« 



Adult jemale.— Wmg 356-377 (369.4); tail 188-196 (192.7); culmen 

 from cere 24-26 (25); tarsus 54-62 (57.7); middle toe without claw 

 54-58 (56.3 mm.)."^ 



Range. — Breeds from the Aleutian Islands and the islands off the 

 coast of southern Alaska (Kyska; Unalaska; Sitka (?); the "nearer 

 islands," i. e., the western ones of the Aleutian Chain; Sergief Island; 

 Forrester Island; occasionally found on St. George Island, in the Prib- 

 ilof group) south to the Queen Charlotte Islands (Graham Island, 

 Langara Island).*^ 



Winters from the Queen Charlotte Islands and Metlakatla, Van- 

 couver, southwestern British Columbia (Chilliwak, and Porcher 

 Island in migration), south to coastal Washington (Carroll Islet); 

 and coastal Oregon (Yaquina Bay, Netarts Bay); casually to Cal- 

 ifornia (Pacific Grove, San Diego Bay). 



Tyjpe locality. — Sitka, Alaska, and Oregon. 



Falco polyagrus, part, Cassin, Illustr. Birds California, Texas, etc., 1854, pi. 16, 

 dark-colored fig. (Oregon). 



Falco communis pealei Ridgway, Bull. Essex Inst., v, 1873, 201 (Oregon; coll, 

 U. S. Nat. Mus.) ; in Baird, Brewer, and Ridgway, Hist. North Amer. Birds, 

 iii, 1874, 137 (Oregon; Sitka, Alaska). — Coues, Check List North Amer. 

 Birds, 1873, 133, No. 343a.— Goode, U. S. Nat. Mus. Bull. 20, 1883, 320. 



Falco peregrinus pealei Ridgway, Proc. U. S. Nat. Mus., iii, 1880, 192; Nom. 

 North Amer. Birds, 1881, No. 414a); Ibis, 1882, 297, footnote (Kiska Harbor, 

 Aleutian Islands; descr. adult female); Man. North Amer. Birds, 1887, 248; 

 Condor, xxviii, 1926, 240 (type spec; crit.). — Nelson, Cruise Corwin in 

 1881 (1883), 78 (Unalaska Island, Alaska).— Turner, Auk, ii, 1885, 157 

 ("Nearer Islands," Aleutian Chain). — American Ornithologists' Union, 

 Check-list, 1886, and ed. 2, 1895, No. 356a; ed. 3, 1910, 

 165; ed. 4, 1931, 75. — Rhoads, Proc. Acad. Nat. Sci. Philadelphia, 

 1893, 40 (Vancouver, Brit. Columbia; Nisqually?). — Bishop, North Amer. 

 Fauna, No. 21, 1900, 75 (at sea, s. of Aleutian Islands, Oct. 7). — Osgood, 

 North Amer. Fauna, No. 21, 1901, 43 (Hecate Strait, Queen Charlotte 

 Islands, July 2). — Bailey, Handb. Birds Western United States, 1902, 168 

 (w. United States; descr.; distr.). — Woodcock, Oregon Agr. Exp. Stat. 



" Seven specimens from Alaska and Queen Charlotte Islands. 



*'' Nine specimens from Alaska and Queen Charlotte Islands. 



*^ The birds breeding in the Commander Islands, usually called pealei, are a 

 different race for which the name Falco rudolfi Kleinschmidt (Falco, ix, 1909, 19) 

 seems to be available. They have the pectoral spots, especially in the female, 

 very much broader than in pealei. 



