LARUS. 33 



ered all over with soft yellowish 

 gray down, whiter in tint on the 

 face, throat, and abdomen ; forehead 

 blackish brown ; entire upper parts 

 spotted here and there with large 

 blackish spots, one or two spots be- 

 ing also on the throat, under parts 

 generally unspotted, except that on 

 the flanks there are some irregular 

 black marks. It may be distin- 

 guished from the young of other 

 Gulls by a large black spot which 

 touches the base of the upper man- 

 dible, and which is never absent, 

 though often varying in size." 

 (Dresser.) Length 17.00-18.50, 

 wing 14.00-14.50 (14.30), culmen 

 1.35-1.60 (1.45), depth of bill through 

 angle .38-.50 (.44), tarsus 1.90-2.25 

 (2.02), middle toe 1.32-1.65 (1.43). 

 Eggs 2.29 X 1-59- Sab. Northern 

 portions of eastern hemisphere ; ac- 

 cidental in Labrador ? 



56. L. canus Linn. Mew Gull. 

 J* Gray wedge on inner web of third quill 

 always terminated with white, and 

 this carried beyond tip of the sixth 

 — often even beyond the tip of the 

 fifth — quill; even the second quill 

 often with a white spot at end of the 

 gray "wedge" on inner web; plu- 

 mage of adult otherwise as in L. 

 canus, but black of primaries much 

 more restricted. Nearly adult : Sim- 

 ilar to the adult in every respect 

 except coloration of the primaries, 

 which have the dark spaces slaty or 

 very dull blackish, instead of deep 

 black, and more extended, the white 

 tips of some of the quills wanting ; 

 tail sometimes (in younger individu- 

 als) more or less blotched with dusky 

 at tip, and upper coverts sometimes 

 (in still younger birds) faintly barred 

 with grayish brown. Young : Above 



