464 PAND10NE9. 



2. Polioaetus humilis. 



Falco humilis, Miill. ^ Schl. Verz. Nai. Gesch. Zool. Aves, p. 47, 



pi. G (1839-44). 

 Ichthyaetus nanus, Blyth, J. A. S. B. xi. p. 202 (1842) ; Strickl. Om. 



Sijn. p. m (1845). 

 Pandion humilis, Gray, Gen. B. i. p. 17 (1845) ; Bp. Cmsp. i. p. 16 



(1850) ; &-hl. Vog. Nederl. Ltd., Valkv. pp. 13, 53, pi. 5. fig. 3 



(1866) ; Blyth, Ibis, 1866, p. 244 ; Gray, Hand-l. B. i. p. 15 



(1869). 

 Pontoaetus nanus. Gray, Gen. B. i. p. 18 (1845) ; Blyth, Cat. B. 



Mu,i. A. S. B. p. 30 (1849) ; id. Ibis, 1863, p. 22. 

 Polioaetus humilis, Kaup, Contr. Om. 1850, p. 73 ; Wall. Ibis, 1868, 



p. 14 ; Walden, Tr. Z. S. viii. p. 35 (1872). 

 Haliaetus humilis, Schl. Mus. P.-B. Aquilse, p. 18 (1862). 



Adult female. Above ashy brown, the back and wings darker and 

 more chocolate-brown, the feathers of the crown and hinder neck 

 slightly fulvescent towards their tips ; lores and an indistinct eye- 

 brow whitish ; cheeks and entire throat and breast, as well as under 

 wing-coverts, entirely ashy brown, the throat and fore part of 

 cheeks slightly varied with whitish streaks ; lower abdomen, thighs, 

 vent, and under tail-coverts white ; primaries black, whitish at base 

 of inner web, secondaries brown, like the back ; tail pale brown at 

 base, gradually becoming darker brown towards the tip, which is 

 not very broadly white ; a few whitish feathers on the bend of the 

 wing ; bin and cere dusky lead-colour ; feet pale bluish white ; iris 

 light yellow. Total length 23 inches, culmen 2-05, wing 16-2, tail 

 8-8, tarsus 2-85, middle toe 1-95. 



Young male (type in Mus. Lugd.). Above brown, with margins 

 of fulvous brown to the feathers of the upper surface ; the lower 

 back and rump varied with white, showing at the base of the 

 feathers; forehead, eyebrow, sides of face, and hind neck white, 

 with pale brown margins to the feathers, giving a slightly streaked 

 appearance to these parts; quills dark brown, secondaries pale 

 brown, like the back ; tail above brown, very sUghtly tipped with 

 white, the middle feathers and the ends of the others darker brown, 

 with remains of indistinct bars of blackish brown, all the rectrices 

 white at base and on the inner web, showing very plainly under- 

 neath ; under surface of body pure white, the breast-feathers with 

 irregular margins of very pale ashy brown, a little darker on the 

 greater under wing-coverts; inner lining of quills white at base. 

 Total length 18-5 inches, culmen 1-8, wing 13-8, tail 7-6, tarsus 

 2-85, middle toe 1-7. 



Hah. From Assam down the Malayan peninsula to Sumatra and 

 Celebes. 



_. c? ad. St. India. Dr. Gray [P.]. 



b. d ad. sk. Assam. J. Gould, Esq. [P.]. 



c. c? ad. sk. Malacca. 



d. $ ad. sk. Macassar, Celebes. A. R. Wallace, Esq. [P.]. 



a 



