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two lines ; the wings extend an inch be- 
yond the extremity of the tail. 
" Birds of the first year have the fore- 
head, space about the eyes, all the inferior 
parts, and two-thirds of the tail white ; top 
and back of the head dusky ash-colour ; 
back of the neck and back of a brownish 
grey ; lesser wing coverts whitish, with 
grey and dusky spots; middle coverts dusky 
grey, edged with light brown ; the greater 
coverts are whitish outwardly, and at their 
extremities; the four first quills dusky 
upon their outer webs and at their ends, 
but white upon their inner webs ; the three 
next ash-coloured outwardly, and their 
points white ; tail slightly forked, and ter- 
minated by a broad black band, which is 
least upon the exterior feather ; beak of a 
dusky brown ; legs livid flesh-colour. 
" In the breeding season, all the head 
and upper part of the neck are black, with 
a white crescent behind the eyes; lower 
part of the neck and all the under parts 
white, with a rose-coloured tinge, which 
latter goes off after the bird has been pre- 
served ; rump and tail perfect white ; back, 
