25 



FALCO ISLANDUS. 



(ICELAND FALCON.) 



Accipiter falco islandicus, Briss. Orn. i. p. 336 (1760). 



Accipiter gyrfalco islandicus, Briss. torn. cit. p. 373, pi. xxxi. (1760). 



Le Gerfaut d'Islande, D'Aubent. PL Enl. 210 (1770). 



Falco islandus, Gmel. Syst. Nat. i. p. 271 (1788). 



Hierofalco islandicus, C. L. Brehm, Vog. Deutschl. p. 55 (1831). 



Falco islandicus, Hancock, Ann. Nat. Hist. ii. p. 247(1839). 



Falco candicans islandicus, Schl. Abh. Geb. Zool. p. 14 (1841). 



Falco arcticus, Holb. Zeitschr. ges. Naturw. Hi. p. 426 (1854). 



Falco gyrfalco islandicus, Schl. Mus. Pays-Bas, Falc. p. 14 (1864). 



Falco holbcelli, Sharpe, P. Z. S. 1873, p. 415. 



Hierofalco holbcelli, Sharpe, Cat. Accip. p. 415 (1874). 



Falki, VeffSifalM, Valur, Icelandic; Fdlkur, Faeroese; Jagtfalk, Islandsk-Falk, Danish. 



Figurce notabiles. 



D'Aubenton, PI. Enl. 210 ; Naumann, Vog. Deutschl. taf. 22. figs. 1, 2, taf. 390. fig. 2 ; 

 Salvin & Brocl. pi. 11; Sharpe, Cat. Accip. pi. 13, left figure; Gould, B. of G. Brit. i. 

 pis. 11, 12. 



Ad. fronte alba nigro-fusco striata : pileo, nucha et collo postico albis, plumis ccntralitcr nigro-schistaceis : 

 dorso et alis supra saturate fusco-schistaceis, albido et albo-cervino fasciatis : uropygio et supracau- 

 dalibus schistaceo-creruleis, paUide cinereo-cano fasciatis : remigibus schistaceo-nigricantibus, extus 

 cervino-albo notatis et in pogonio interuo eodem colore fasciatis : cauda cinerea, fusco-schistaceo 

 fasciata et albo terminate : mento et gula albis, gutture nigro-fusco striato : corpore relicpio subtus 

 albo, guttis nigro-fuscis notato, hypochondriis in parte superiore conspicue eodem colore maculatis 

 et in parte ima fasciatis, subcaudalibus pallide schistaceo fasciatis : rostro cseruleo-corneo, versus 

 apicem saturatiore : cera, et pedibus fiavis : iride fusca. 



Juv. Falconi gyrfalconi similis sed capite pallidiore, stria mystacali nulla, corpore supra et cauda saturation bus 

 et liac minus fasciata. 



Adidt Male (Greenland) . Forehead white, striated with blackish ; crown and nape dull white, the centres 

 of the feathers slaty black, the hind crown having these centres to the feathers very fully developed ; 

 back, scapulars, secondaries, and wing-coverts dark slate with a brownish tinge, more or less regularly 

 barred with white, or white with a buff tinge ; rump and upper tail-coverts dull slate-blue, barred with 

 blue-grey; quills slaty blackish, marked on the outer web and barred on the inner web with buffy 

 white; tail ashy grey, barred with dark blackish or brownish slate, and tipped with white, the outer 

 rectrices having a whiter ground-colour than the central ones ; sides of the head like the crown ; chin 

 and upper throat white; lower throat streaked with blackish brown; rest of the underparts white, 



2D 



