521 



AQUILA MOGILNIK. 



(IMPERIAL EAGLE.) 



Falco mogilnik, S. G. Gmel. Nov. Com. Petrop. xv. p. 445 (1771). 



Falco melanceetus, Gm. Syst. Nat. i. p. 254 (1788). 



Aquila chrysaetos, Leisl. Wett. Ann. ii. p. 170 (nee Linn., 1809). 



Aquila heliaca, Savig. Ois. d'Egypte, p. 82 (1810). 



Falco imperialis, Bechst. Orn. Taschenb. p. 553 (1812). 



Aquila imperialis (Bechst.), Keys. & Bias. Wirbelth. p. 40 (1840). 



Aquila riparia, Pr. Wiirt. Icon. ined. no. 4 (1840). 



Aigle Imperial, French ; Kaisers Adler, German ; Mogilnik, Karagousch, Russian. 



Figure notabiles. 



S. G. Gmel. torn. cit. pi. 11 B ; Savigny, torn. cit. pi. xii. ; Susemihl. Vdg. Eur. pi. 14, ad. ; 

 Naumann, Vog. Deutschl. pi. 6, ad., pi. 7, juv., pi. 340. fig. 1 (fig. 2?); Werner, Atlas, 

 Fapaces, pi. 14; Gould, B. of Eur. pi. 5; Bree, B. of Eur. pi. 



$ ad. nigricanti-umbrinus : capite summo nuchaque saturate arenario-isabellinis, hac vix rufescente lavata : 

 fronte saturate umbrina, : uropygio paullo rufescente notato : Cauda saturate grisea, brunneo marmorata, 

 ad apicem nigricanti-brunnea, vix albido terminate : remigibus nigricantibus, tectricibus alarum scapu- 

 laribusque concoloribus, ex his quibusdam conspicue niveis : subtus nigricanti-umbrinus, subcaudalibus 

 crissoque pallide brunneis : rostro caerulescenti-corneo : cera pedibusque flavis, unguibus nigricantibus : 

 iride pallide griseo-fulva. 



Juv. ochrascenti-albidus, striatus : dorso pallide fusco, plumis omnibus medialiter flavicanti-arenariis : dorso 

 imo, uropygio supracaudalibusque vix rufescente lavatis, his flavicante albido terminatis : rectricibus 

 saturate fulvis, vix pallide brunneo apicatis : remigibus nigricantibus, secundariis conspicue flavicante 

 albo terminatis : tectricibus alarum majoribus fulvis, saturate albido apicatis, tectricibus minimis 

 scapularibusque dorso concoloribus : gula, guttureque flavicanti-arenariis : pectore et abdomine 

 ochrascenti-albidis, striatis, plumis omnibus fulvido marginatis : tibiis et tarsi plumis, crisso sub- 

 caudalibusque ochrascenti-albidis immaculatis : rostro, cera, pedibusque ut in adulto coloratis. 



Adult Male (Bulgaria, April 1866). Blackish brown; head and neck above dull creamy yellow; forehead 

 strongly marked with dark brown ; nape dull rufous yellowish ; rump intermixed with lighter brown 

 feathers ; tail dark grey marked with brown, having a broad terminal blackish brown band, and finally 

 narrowly tipped with light brown ; quills and wing-coverts dark blackish brown ; the feathers on the 

 edge of the wing lighter brown ; some of the scapulars pure white, others dark brown ; under tail- 

 coverts lighter brown than the rest of the underparts ; beak bluish, darker at tip ; cere and legs pale 

 yellow ; iris brownish yellow. Total length 31 inches, culmen 2'85, wing 23*5, tail ll - 6, tarsus 3"9. 



Young. Head and neck pale brownish yellow, or honey-brown, every feather margined with dark earth- 

 brown, giving it a striated appearance ; back and scapulars dull earth-brown, the feathers having the 



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