588 



pis. 11, 12 ; Susemihl. Vog. Eur. taf. 28 ; Salv. & Brod. Falc. Brit. Id. pis. 22, 23 ; 

 Schlegel & Verster, Traite Fauc. pis. x. xi. 



6 ad. pileo nigricanti-schistaceo, fascia alba, striis parvulis fuscis adspersa a fronte supra oculos ad nucham 

 ducta : nucha alba nigricante schistaceo notata : corpore supra saturate cinereo-schistaceo : remigibus 

 saturate fuscis vix cinereo tinctis, fasciis obsoletis fuscis notatis : cauda cinereo-fusca albo apicata et 

 nigro-fusco fasciata : corpore subtiis albo, in gula lineis longitudinalibus, in pectore et corpore imo 

 lineis transversis fuscis ubique notato : cera vires centi-lutea : iride saturate flava : rostro nigricanti- 

 corneo : pedibus luteis, unguibus nigris. 



$ ad. mari similis sed major, corpore supra brunnescentiore. 



Juv. pileo et nucha fuscis, plumis fulvido marginatis : corpore supra saturate fusco, plumis pallide ochraceo 

 apicatis : scapularibus et supracaudalibus ad basin ochrascente albido fasciatis et notatis, his rufescente 

 fulvido terminatis : remigibus fuscis vix cinereo tinctis et saturate fusco fasciatis, secundariis albido 

 apicatis : cauda brunnescenti-cinerea fusco fasciata : corpore subtiis albo cervino tincto, ubique maculis 

 longitudinalibus fuscis, postice obtusis notato. 



Adult Male (Archangel, 27th November) . Crown and sides of the head blackish slate ; a narrow line over 

 the eye, widening to a patch behind the eye, and reaching nearly to the nape, white, marked with 

 blackish slate; nape dark slate, marked with white ; entire upper parts dark ashy slate, the feathers on 

 the fore part of the back with rather darker margins ; quills dark brown, with an ashy tinge, obsoletely 

 barred on the outer web, and mottled with greyish white on the inner web ; tail ashy brown, with four 

 dark brown bands, and tipped with white ; throat white, indistinctly barred with grey, and marked 

 with blackish shaft-streaks ; rest of the underparts white, barred with slate-grey ; the breast being 

 distinctly marked with shaft-streaks ; under tail-coverts pure white ; bill bluish horn ; cere yellow, 

 with a greenish tinge ; iris orange-yellow or bright yellow ; legs yellow ; claws blackish. Total length 

 about 22 inches, culmen 1*4, wing 13 - 0, tail 10-0, tarsus 3*1. 



Males in my collection vary somewhat in size, the measurements being as follows — culmen 1-3-1-4, wing 

 12-6-13-0, tail 9-5-10-1, tarsus 3-0-3-1. 



Adult Female (Wermland, Sweden). Resembles the male, but is larger, and, as a rule, somewhat browner 

 and duller on the upper surface of the body, and rather more broadly barred on the underparts. In 

 size examples in my collection measure as follows — culmen 1-5-1-7, wing 13-5-14-5, tail 10 - 5-12'0, 

 tarsus 3-4-3-6. 



Young Male (Wermland, Sweden). Crown and nape dark brown, the feathers bordered with light reddish 

 brown, the hidden base of the feathers white ; back and wing-coverts dark brown, slightly tipped with 

 yellowish white ; scapulars and upper tail-coverts similarly coloured, but irregularly barred and marked 

 on the basal portion with yellowish white, the latter being also broadly tipped with rufous ; quills dull 

 brown with a greyish tinge, barred with dark brown, the secondaries tipped with dirty white; tail 

 greyish brown, tipped with dirty white, and crossed by four broad dark brown bars ; underparts white, 

 with a warm buffy tinge, closely marked with elongated drop-shaped stripes of dark brown ; cere and 

 legs greenish yellow ; bill bluish horn ; iris yellow. 



Nestling. Covered with pure white down. 



Obs. I find that the specimens in the series before me vary considerably inter se in coloration. The male 



