Faune Obnithologique de la Sibéeie Orientale. 



37 



La description originale de Mr. Ridgway est la suivante: 



«Young $. (Nro 89127, collectors Nro 1055, Bering Island, May 15, 1882). — 

 Ground color of pileura, паре, upper back, rurap, with lesser and middle wing-coverts dirty 

 white, spotted with grayish brown, the spots of the latter color beingchiefly subtcr rainai, but 

 often occupying the tip of the feathers; upper partof rump with white largely predorainating; 

 greater wing-coverts and longer scapulars uniform dusky, bordered terminally with mottled 

 dirty grayish white; tertials uniform slate dusky; upper tail-coverts mottled dusky termi- 

 nally, mottled white basally; rémiges uniform brownish black; rectrices blackish dusky, 

 the inner webs much mottled with pale grayish and buffy white. Side of head with a broad 

 and distinct stripe of nearly uniform brown, occupying the entire orbital and auricular ré- 

 gions. Entire lower parts white, all the feathers with distinct dusky shafts; those of tliroat 

 streaked with pale brown, those of jugulum and upper breast with a large terminal spot of 

 dusky, many of the feathers of sides and abdomen with small and usually indistinct brown 

 terminal spots; thigs and crissum dirty white, the feathers with dusky terminal spots, thèse 

 largest on crissum, and on upper and inner portions of thigs coalesced so as to form the 

 predominating color. Under side of wing white, spotted with dusky». 



«Jris faint yellowish white. Bill horny brown; cere yellow, on culmen shaded with 

 horny brown. Feet vivid golden yellow». 



«Dimensions. Total length 890 mm.; stretch -of wing 2220 mm., wing 630 mm., tail 

 feathers 322 mm.; culmen from cere 56 mm., radius of curvature from cere to tip 35 mm.; 

 height of upper mandible at fore border of cere 29 mm., externa] bord of bind claw 

 44 mm.» (Stejneger). 



Cet oiseau, comme l'avoue l'auteur même est fort douteux et n'est probablement qu'une 

 variété individuelle du pygargue commun. 



1 1 . Haliaetus pelagicus. 



Aquïla marina Steiler. M. S. 



Aquila peîagica Pall. Zoogr. Ross. As. I, p. 343. tb. XVIII. 



Falco leucopterus Temm. P. C. CDLXXXIX. 



Faïco Imperator Kittl. Kupfert. Vög. p. 3, tb. II, f. 1. 



Haliaetus pelagicus Каир, Ок. Isis. 1847, p. 283.— Temm. et Sehl. Faun. Jap., Av. p. 10, tb. IV — 

 Midd. Sibir. Reis. II, Th. II, p. 125.-Schr. Reis. Forsch. Amurl. I, Th. II, p. 222.— Przew. 

 Voy. Ussuri, Suppl. p. 52 (en russe). — Dyb. J. f. 0. 1876, p. 190; Bull. Soc.Zool. Fr. 1883, 

 p. 351. — Tacz. Bull. Soc. Zool. Fr. 1876, p. 120; 1883, p. 329; 1886, p. 305; Dyb. et Tacz. 

 Bull. Soc. Zool. Fr. 1884, p. 145.— Nikolski. Ile de Sakhal. et sa Faune, p. 221, (en russe).— 

 David, et Oust, Ois. Chine, p. 13.— Sharpe, Cat. B. Brit. Mus. I, p. 306. 



Haliaetus (Thalassaëtus) pelagicus Каир. Wiegm. Arch. 1850, p. 39. 



ThalassaHus pelagicus Gr. H. List. B. Brit. Mus. I, p. 17. — Stejneg. Orn. Expl. Coinand. Isl. a 

 Kamtsch. p. 217; Pr. U. S. Nat. Mus. 1887, p. 141. 



