LARUS. 



33 



ered aii over with soft yellowish 

 gray down, whiter in tint on tho 

 face, throat, and abdomen ; forehead 

 blackish brown ; entire upper parts 

 spotted hero and there with largo 

 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 niaj- be distin- 

 guished from the 3-oung of other 

 Gulls by a large black spot which 

 touches tho base of the upper man- 

 dible, and which is never absent, 

 though often varj-ing in size." 

 (Dhesser.) 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. Hab. Northern 

 portions of eastern hemisi^here ; 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 bej-ond 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 

 verj- 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 



