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LARUS LEUCOPTERUS. THE WHITE-WINGED 

 GULL. 



LESSER ICELAND GULL. 



Larus Islandicus. Iceland Gull. Edmondston, Mem. Wem. Soc. V. 268. 

 Larus arcticus. Northern Gull. MacGiUivray, Mem. "Wern. Soc. V. 268. 

 Mouette leucoptere. Larus leucoptcrus. Temm. Man. d'Ornith. X. 467. 

 Iceland Gull. Larus Islandicus. Selb. Illustr. II. 501. 

 Larus Islandicus. Jen. Brit. Vert. Anim. 279. 

 Larus leucopterus. Bonap. Comp, List, 63. 



Bill nearly two inches along the ridge, ichich is moderately 

 decurved toward the end, eight-twelfths high at the angle, 

 ivhich is little 'prominent; tarsus two inches and a half long; 

 loings a little longer than the tail; total length from ticenty to 

 ttventy-five inches. Achdt in winter ivith the hill tvine-yelloiv, 

 the lower mandible ivith an orpiment-red patch toivard the 

 end ; the margins of the eyelids ycllou-ish ; the feet flesh- 

 coloured ; the back and wings light bluish- grey ; quills all 

 white at the end; the head and neck white, streaked ivith very 

 pale broivn; all the other parts pure white. In summer, the 

 hill gamboge-yellow ; the patch on the lower mandible orange- 

 red, as are the edges of the eyelids ; the head and neck pure 

 white, the other parts as in winter. Young with the bill 

 brownish-black toward the end, at the base pale flesh-coloured ; 

 the general ground colour of the plumage pale yellowish-grey ; 

 the head and neck longitudinally streaked ivith very piale 

 hroivn ; the upper parts ivith transverse irregidar bands; the 

 lower confusedly mottled and barred with pale brown and 

 y ellowish- white ; the quills greyish-white, irregularly marked 

 with pale brown ; the tail greyish-white, spotted and barred 

 with pale brown. 



