LARIDA. 605 
the shorter ones very slightly edged with dull white 
at the tips; the breast, belly, flanks and under tail- 
eoverts are white, mottled with pale brown (paler 
than on the back), mostly on the breast and fianks ; 
the tail is white, much barred and mottled with 
brown. A bird in intermediate plumage, shot on the 
17th of July, has the bill generally dark horn-colour, 
with occasional irregular patches of yellow, and two 
small patches of red on the angle of the lower 
mandible; the extreme tip of both mandibles is 
light horn-colour; the head, neck and breast are 
dirty white, with a few small streaks of brown on 
the nape; the back and scapulars are nearly all new 
feathers the same as in the adult, but a few of the 
old ones are still left; these are of a paler colour and 
tinged with brown; the wings are quite a muddle of 
pale brown, dark brown, and a few feathers as in the 
adult; the lesser wing-coverts are the palest brown, 
and this colour is disposed much more regularly on 
one wing than the other; the primary quills are dark 
dusky brown, without any white tips, except on a few 
of the shorter ones; the secondaries are much the 
same, tipped and partly margined with dirty white ; 
the tertials are the same, except one or two feathers 
which are like the adult; the rump and tail-coverts 
are white; the tail-feathers, except the second and 
third from the outside on each side of the tail, 
are white; these four feathers are the old feathers 
not moulted, and are white, much mottled with 
oF 3 
