142 



230. Thalassoaetus pelagicus pelagicus^ (Pall.), 

 Zoogr. Rosso-Asiat., i., p. 343 (1827). [Is- 

 lands between Kamtschatka and America : 

 Bering /.] 

 Steller's Sea-Eagle. 



Wing ad. $ 560-580, ? 600-620 mm. (juv. 

 $ 645, juv. ? 680 mm.) ; tail ad. cJ 330-350, 

 ? 340-360 (juv 3 385, juv., ? 390 mm.) ; 

 general plumage blackish brown, with buf fy 

 white streaks to head and neck and chest ; 

 wing-coverts, rump, upper and under tail- 

 coverts, tail and thighs white ; immature 

 has these latter parts only mottled with 

 white, and no whiite on shoulders. 



N.E. Siberia, 

 Kamtschatka, 

 Bering I., 

 Sakhalin ; in 

 winter S. to 

 Koreo, Japan, 

 Amur region & 

 Loo Choo Is., 

 also Alaska. 



230a. Thalassoaetus pelagicus niger Heude, Nat- 

 uraHste, 1887, p. 95. [Korea.'] [ = H. 

 branickii, Tacz.] 

 Black Sea-Eagle. 



Wing (? 550, ? 608 mm. ; differs from T p. 

 pelagicus in the great height of its bill and 

 also in having only the tail and under tail- 

 coverts pure white ; rest of plumage black, 

 the feathers on crown and neck with a 

 fine central greyish line; bill and feet 

 orange-yellow. 



Korea. 



Gen. LXV. CUNCUMA Hodg. (1857). 



Type by orig. desig. HaUaetus albipes Hodgs. =Aquila leucorypha 



Pall. 



Tail of 12 feathers, graduated ; bill weaker, the 

 height much reduced. 



1 T. macrurus (Menzb.) from Yakutsk, E. Siberia, is a synonym, based 

 on an immature bird, which appears to me generally to have longer primaries and 

 longer and more graduated tail feathers than in the adult bird. 



