292 COLYMBUS GLACIALIS, 



Young. — As tlic bird does not breed witb us, I cannot 

 describe the young Avhen fledged. In October and No- 

 vember, however, they arc as follows : — The bill has the 

 ridge of the upper mandible dusky, its edges and basal part, 

 with the whole of the lower mandible, greenish-yellow. The 

 iris brown. The feet dusky externally, yellowish-flesh- 

 coloured internally ; the webs flesh-coloured ; the claws 

 brownish-yellow, dusky at the end. The upper part of the 

 head and the nape dark greenish-brown ; the hind part and 

 sides of the neck greyish-brown, the latter mottled with 

 greyish-Avhite. The feathers of the head and neck are soft 

 and almost downy ; those of the back rounded at the end, 

 and not truncate, as in the adult. The feathers of all the 

 upper parts are brownish-black toward the end, broadly 

 margined with ash-grey ; the margins larger and paler on 

 the feathers of the middle of the back, and especially the 

 scapulars ; on those of the hind part of the back narrow. 

 The quills and tail-feathers are blackish-brown, with a 

 greenish gloss. The fore part of the neck is greyish-white, 

 minutely and faintly mottled with grey ; the cheeks also 

 variegated ; the lower sides of the neck streaked with grey ; 

 all the lower parts pure white, excepting under the wings, 

 where the feathers are like those of the back, the axillars, 

 which are streaked Avith grey, and a band of brownish-grey 

 across the hind part of the abdomen, together with the 

 feathers under the tail, which are grey tipped with whitish. 

 This, I think, must be the first plumage, as some individuals 

 seen in it were very small. Some of the dimensions of two 

 are as follows : — 



ISIale. — Length to end of tail 31 inches ; extent of wings 

 49 ; wing from flexure 13^ ; tail 2| ; bill along the ridge 2jV, 

 along the edge of lower mandible 4:-f^ ; tarsus 3^'^ > outer 

 toe 4jij, its claw -^. 



Female. — Length to end of tail 21) inches ; extent of 

 wings 46 ; wing from flexure Vol-; tail Sij ; bill along the 

 ridge ilj-^, along the edge of lower mandible 4 J^ ; tarsus 

 3^ ; outer toe 4-j^, its claAv -j\. 



