ACCIPITRES. 



FALCONID^. 



AQUILINE. 



Genus POLIOAETUS. 



Bill not so long nor straight as in Haliaetus, but deeper and more powerful in proportion to 



its size ; culmen boldly arched from the cere ; festoon slightly pronounced ; nostrils oval and 



exposed ; cere moderately advanced. Eyelid devoid of lashes. Wings moderate, rounded, the 



4th and 5th quills the longest, the 1st subequal with the 9th. Tail moderately long, considerably 



exceeding the closed wings, rounded at the tip. Tarsus very stout, its upper third feathered in 



front, the rest covered with broad rectangular scutae, the posterior with large irregular scales. 



Toes stout, protected above by rectangular scales nearly to the base. Claws long, much curved 



and rounded beneath. 



POLIOAETUS ICHTHYAETUS. 



(THE BAR-TAILED FISPI-EAGLE.) 



Falco ichthyaetus, Horsf. Tr. Linn. Soc. xiii. p. 136 (1822) ; id. Zool. Res. Java, pi. 34 (1824). 

 Pandion ichthyaetus, Vig. Zool. Journ. i. p. 321 (1824) ; Horsf. & Moore, Cat. B. Mus. East 



Ind. Comp. p. 53. no. 65 (1854); Schleg. Vog. Nederl. Ind., Valkv. pp. 13, 62, pi. 5. 



figs. 1, 2 (1866). 

 Haliaetus ichthyaetus, Cuv. Regne An. i. p. 327 (1824). 

 Haliaetus unicolor, Gray & Hardw. 111. Ind. Zool. i. pi. 19 (1830). 

 Ichthyaetus horsfiel&i, Blyth, J. A. S. B. xi. p. 110 (1842). 

 Pontoaetus ichthyaetus, Gray, Gen. B. i. p. 17 (1845); Blyth, Cat. B. Mus. A. S. B. no. 121, 



p. 30 (1849) ; Layard, Ann. & Mag. Nat. Hist. 1853, xii. p. 101 ; Kelaart, Prodromus, 



Cat. p. 115. 

 Palioaetus ichthyaetus, Kaup, Contr. Orn. 1850, p. 73 ; Jerd. B. of Ind. i. p. 81 (1862) ; Blyth, 



Ibis, 1866, p. 243; Hume, Rough Notes, ii. p. 1 (1870); Holdsworth, P. Z. S. 1872, 



p. 412; Hume, Nests and Eggs, p. 43 (1873); Sharpe, Cat. Birds, i. p. 452 (1S74); 



Legge, Ibis, 1875, p. 278 ; Hume, Str. Feath. 1875, vol. iii. p. 28 ; Legge, ibid. p. 362. 

 White-tailed Sea-Eagle, Fishing-Eagle, Europeans in India ; Tank-Eagle in Ceylon. 

 Matchmorol, " Fish-Tyrant," Bengal ; Madhuya, Hind. ; Jokowuru, Javanese. 

 Rajaliya, Sinhalese ; Ala, Tarn, in Ceylon. 



Adult wale. Length to front of cere 23 - to 24-0 inches ; culmen from cere 1*8 ; wing 17 - to 17 - 5 : tail 9-5 to 1O0 ; 

 tarsus 3-5 ; mid toe 2-3 to 2-4, claw (straight) 1-2 ; inner claw (straight) 1-3 ; height of bill at cere 0-65. 



Adult female. Length to front of cere 25-5 to 26-0 inches ; culmen from cere 1-8 : wing 1S-0 to 1S-3 ; tail 10-0 ; tarsus 



3-5 ; mid toe 2-3 to 2-5. Expanse 58-5. 

 These measurements are from Ceylon examples. 



Iris clear yellow, sometimes tinged with reddish and mottled with brown ; bill dark horn, paling to bluish near the cere 



