202 



the inner web in very old birds), and with the black of the upper 

 part of the inner web clear of the shaft; 3rd quill similar, but with 

 more subterminal black (see cut on p. 201) ; 4th quill similar, but 

 with grey next the shaft on the inner web and its margin black ; 

 5th quill grey on both webs, and a subterminal bar which is some- 

 times incomplete ; remaining quills grey ; under wing-coverts grey, 

 in strong contrast with the black of the (juills : " bill crimson " 

 (Gibson); tarsi and toes dull red; "iris dark brown, pupil black" 

 (Gibson). In less mature examples there is more or less of a bar 

 (or only a spot) on the outermost quill, a short streak of black on 

 the outer web of the 2nd quill, and more black on the inner webs 

 generally. Total length 15 inches, culmeu 1"7, wing 12, tail 5, 

 tarsus 2, middle toe with claw 1*65 to 1-7. 



The female appears to be a trifle smaller. 



Adult in winter. Devoid of hood, but only for a short time, and 

 without the rosy tint on the underparts : otherwise like the above. 



1 2 3 



Larus maculipeimis, juv. 



Young. Head white, with some greyish brown on the occiput 

 and auriculars ; mantle and wing-coverts grey, mottled with brown; 

 secondaries with ash-brown centres ; the five outer quills chiefly 

 sooty brown terminally and on their inner webs, with indications 

 of incipient mirrors on the two outer quills ; the inner quills with 

 some white basally, and, although with a larger proportion of 

 black, yet generally similar to the pattern in the adult ; tail with a 

 sooty terminal band. In rather older birds there are elongated 

 mirrors on the three outer quills (see cut). Bill dull red, blackish 



