LESSEIi BLACK-BACKED GULL. 543 



(linal light brown streaks ; the neck and lower parts of a 

 whitish colour, almost entirely covered with larj^e spots of a 

 very deep brown ; the upper parts, and all the feathers of the 

 wings, of a blackish-brown in the middle, all bordered with 

 a narroAV yclloAvish band ; tail-feathers at their base of a pale 

 grey, marbled with black ; the other parts of a very deep 

 dusky, terminated with white ; the quills deep black, with- 

 out any white spot toward the end ; beak black, brown at its 

 base ; feet dull ochre-yellow. 



