78 



corpore suprk nigro, fusco-ferrugineo et albido variegato : uropygio et supracaudalibus albis, nigro 

 transfasciatis et ferrugineo notatis : remigibus primariis nigricantibus, secundariis saturate cinereis 

 albo terminatis : tectricibus alarum saturate cinereis, albo apicatis, plumis nonnullis dorso concoloribus : 

 cauda cinerea, albo apicata : subtiis ferrugineus, abdomine imo et subcaudalibus albis : rostro et 

 pedibus nigricantibus : iride fusca. 



Ad. ptil. Mem. pileo, nucha et corpore supra pallide et sordide cinereis, indistincte saturate cinereo striatis, 

 uropygio et supracaudalibus haud ferrugineo notatis : cauda et alis sicut in ptilosi sestivali picturatis, 

 sed tectricibus alarum pallidioribus : corpore subtiis albo, gutture, pectore et hypochondriis sordide 

 cinereo striatis et notatis. 



Juv. adulto in ptilosi hiemali similis sed supra saturatiore, plumis nigricanti et ochraceo-cervino roarginatis : 

 capite nigricanti notato : gutture, pectore et hypochondriis ochraceo-cervino lavatis. 



Pull, lanugine indutus : fronte cervina, centraliter nigro striata, supra oculos striis duabus ad nucham pro- 

 ductis : pileo postico nigro, rufescenti notato et cervino guttato : nucha isabellino-cervina, vix nigro 

 notata : corpore supr&, nigro, rufescente fusco notato et profuse albido guttato : corpore subtiis albo vix 

 cervino lavato. 



Adult Male in summer (Spain, 6th May) . Crown, nape, and hind neck light rusty rufous and white inter- 

 mixed, and tolerably closely striped with black ; back and scapulars black, conspicuously marked with 

 rufous and edged with white ; primary quills blackish, the shafts white, secondaries dark grey, the short 

 ones terminated with white ; wing-coverts dark grey tipped with white and slightly intermixed with 

 feathers coloured like the back; rump and upper tail-coverts white, barred with black, and slightly 

 intermixed with rufous ; tail dark grey narrowly margined with white ; throat, neck, and underparts 

 generally rich rust-red, except the centre of the lower abdomen and under tail-coverts, which are white 

 marked with rusty red, the latter being slightly marked with narrow black stripes; bill and legs 

 blackish; iris dark brown. Total length about 10 inches, culmen l - 5, wing 6"7, tail 2'6, tarsus T25. 



Adult Female (Spain, 6th May). Does not differ from the male, except in being a trifle less in size. 



Adult in ivinter. Crown, nape, back, scapulars, and inner secondaries light dull greyish ash with faint 

 darker stripes ; rump and upper tail-coverts white barred with black ; wings and tail as in the summer 

 dress ; but there is no trace of rufous in any part of the plumage, and the wing-coverts are lighter ashy 

 grey; underparts white, the throat, sides of the neck, breast, and flanks slightly striped and marked 

 with dull ashy grey. 



Young (Lincoln Bay, 82° 7' N. lat., 31st August). Differs from the adult in winter dress in having the 

 upper parts darker grey, the head being marked with blackish and warm buff, and the feathers on the 

 upper parts of the body being margined first with blackish and then with warm buff, giving the upper 

 parts a varied appearance ; the throat, breast, and flanks washed with warm buff, the rest of the under- 

 parts being as in the adult bird in winter. 



Nestling in down (Floe-berg Beach, 30th July). Forehead warm buff with a central black line; over the 

 eye a double black line ; crown, from the centre backwards, black slightly varied with rufous and dotted 

 with buff; nape creamy buff slightly varied with blackish ; upper parts of the body black slightly varied 

 with reddish brown, and profusely dotted with creamy white ; underparts white slightly washed with 

 warm buff. 



