238 PALCONID.E. 



s. Ad. sk. Fort Simpson. Bernard II. Eoss, Esq. [P.]. 



t. Skeleton. Zoological Society [A. bar- 



t/ielcmyi^. 



3. Aquila heliaca. 



Aqitila heliaca, Sav'u/n. Descr. Eyi/pte, p. 459, pi. 12 (1809) ; Vieill. 



et Ond. Gal. Ois. pi. 9 (1825) ; Gould, B. Eur. pi. 5 (1837) ; Gray, 



Gen. B. i. p. 1:3 (1845^ ; Bp. Comp. i. p. 13 (1850) ; Fritsch, Vog. 



Eur. tab. 8. figs. 1-3 (1858) ; Jauh. et Barth. Lap. JRich. (h-n. p. 35 



(1859). 

 Aquila chrysaetos. Lets. Ann. Wetter, ii. p. 170 (1810, nee i.). 

 Falco imperialis, Bechst. Taschenh. Vm/. Deutschl. iii. p. 553 (1812) ; 



Naum. Vog. Deutschl. i. p. 201, Taf. 0, 7 (1822), et xiii. Taf. 340 



(1860) ; Werner, Afl. Rapaces, pi. 14 (1827) ; Schl. u. Susem. Vog. 



Eur. Taf. 14, 15 ri8.39) ; Bree, B. Em: i. p. 58 (18GG). 

 Aquila imperialis, Vuv. Iter/ne An. i. p. 325 (1829) ; Gray, III. Ind. 



Zool. ii. pi. 28 (1833) ; Jerd. B. Ind. i. p. 57 (1862) ; Pelz. Verh. 



z.-b. Wien, 1862, p. 155 ; Degl. et Gerbe, Orn. Eur. i. p. 24 (1867) ; 



Gray, Hand-l. i. p. 10 (1869) ; Hume, Rough Notes, i. p. 142 



(1869); Finsch, Tr. Z. S. vii. p. 201 (1870) ; Salvad. Faun. Hal. 



Ucc. p. 6 (1871 ) ; Saund. P. Z. S. 1871 , p. 37 ; Anders, t. c. p. 686 ; 



id. P. Z. S. 1872, p. 620 ; Shelley, B. Egypt, p. 205 (1872) ; Hume, 



Stray F. i. p. 157 (1873). 

 Aquila crassipes, Hodgs. in Gray's Zool. 3Iisc. p. 81 (1844) ; Brooks, 



P. Z. S. 1872, p. 503 ; Anders. P. Z. S. 1872, p. 620. 

 Aquila mogilnik, Strickl. Orn. Syn. p. 57 (1855) ; Schl. Mus. P.-B. 



Aquilse, p. 3 (1862); Heugl. Orn. N.O.-Afr. i. p. 44 (1869); 



Dresser, B. Eur. pt. xix. (1873). 

 AquUa riparia, Wiirt. MS. ; Heugl. Naum. 1857, p. 432. 

 AquUa bifasciata, Saund. P. Z. S. 1871, p. 37 ; Swinh. t. c. p. 338, 



Younr/. Above rather light brown, the back-feathers mostly shaded 

 down the middle with ashj- and on the margins with purplish ; all 

 the feathers of the upper surface pointed with buffy fawn-colour, 

 giving a spotted character to the plumage ; head and neck tawny 

 buff, the feathers with clear brown bases, which show through more 

 or less, and impart a streaked appearance ; the plumes of the hind 

 neck long and lanceolate, brown, like back, with tawny streaks down 

 the centre ; wing-coverts brown, pointed with fulvous like the back : 

 the greater and median coverts with broad whitish buff terminal 

 spots, widening up the shafts of the feathers ; quills blackish, the 

 secondaries rather browner, and broadly tipped with whitish buff ; 

 feathers of hinder back and rump tawny fulvous, with dark brown 

 lateral margins, spreading more over the ijlumes of the latter part ; 

 upper tail-coverts buffy white, in strong contrast to tail ; tail uniform 

 brown, tipped with buffy white ; under surface light tawny fulvous, 

 nearly uniform on the throat, abdomen, thighs, leg-feathers, and 

 under tail-coverts ; the whole of the breast-feathers laterally mar- 

 gined with brown, producing a distinctly streaked appearance ; under 

 wing-coverts rufous fawn-colour, streaked with brown, the lower 

 series ashy brown, like the inner lining of the wing ; bill and feet 

 as in adult. 



Ohs. The change from the striped under surface to the adult seems 



