188 TARROCK GULL. Class IL 



the color of that, the throat, neck, and whole 

 under side, are white ; near each ear, and un- 

 der the throat, is a black spot ; on the hind part 

 of the neck is a black crescent, the horns point- 

 ing to the throat. The back and scapulars are of 

 a bluish grey ; the lesser coverts of the wings 

 dusky, edged with grey ; the larger next to them 

 of the same color ; the rest grey ; the exterior 

 sides, and ends of the four first quil feathers are 

 black ; the tips of the two next black ; all the 

 rest wholly white ; the ten middle feathers of 

 the tail white, tipt with black ; the two outmost 

 quite white ; the legs are of a dusky ash color. 

 In lieu of the back toe, it has only a small pro- 

 tuberance. 



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