140 THE BIRDS OF MONTREAL. 



long. Upper parts white, with pearl-gray mantle, 

 primary wing feathers black, towards end tipped 

 with white. Lower parts pure white. Young : 

 Grayish-brown. 



1.2. Ring -billed Gull. 



Length about 20 inches. Bill about If inches 

 long, with a black band near tip. Upper parts 

 pure white, with pale pearl-gray mantle, wing fea- 

 thers black and white. Lower parts pure white. 

 Young : Grayish-buff above, and lower parts white, 

 spotted along sides with grayish-brown. 



13. Laughing Gull. 



Length about 17 inches. Bill If inches long. 

 Upper parts, head blackish, mantle plumbeous- 

 slate, primary wing feathers black, and others tip- 

 ped with white. Lower parts pure white. Young ; 

 Head, neck, breast and sides brownish-gray, mantle 

 grayish-brown. 



14. Bonaparte's Gull. 



Length about 14 inches. Bill about 1J inches 

 long. Upper parts white, head dark-plumbeous, 

 mantle pearl-gray, wing feathers black and white. 

 Lower parts white. Young : Sides of head and 

 neck and lower parts white, top of head and back 

 brownish-gray, blackish band across end of tail. 



