6 BRITISH BIRDS. [vol. vi. 



to differ from both the above-described races ; but whether 

 they are representatives of another race meriting the 

 distinction of subspecific rank, the material at present to 

 hand is too meagre to allow me to say. It may, how- 

 ever, be pointed out that the Lesser Black-backed Gull 

 breeds in at least one locality off the Moroccan coast 

 (Alboran Island — Lilford) and extends southwards along 

 the west African shores as far as Bonny (Saunders) ; so 

 that it is very possible that these local birds wander 

 in winter to the Canaries and Madeira or to places like 

 Valencia on the Mediterranean shores, where they may be 

 found along with winter representatives of the light- 

 backed or more northerly race — Larus fuscus hritannicus. 

 These latter points I am now endeavouring to clear up, 



LIST OF BIRDS EXAMINED. 



Light-backed Race — L. fuscus hritannicus. 



Ad. (^ Caithness (Summer) 



Loch Ballon, Ross-shire 5.vi.69 



Loch Lomond . . . . 25. v. 70 



Orkneys .'. .. ..(Summer) 



Faroes 3.ix.73 



Malaga 20.iv.72 



Romney Marsh . . . . 29.vii.83 



Tangiers . . . . (December) 



5.V.88 



Seaton, South Devon . . 27.iii.97 

 (Coll. N. F. Ticehurst) 



^ * Orkneys 2.viii.91 



(Coll. N. F. Ticehurst) 



Imm. (J Setubal, Portugal . . 5.1.06 



5.i.06 



Ad. ^ Bone, Algeria . . . . (January) 



Malaga 21.x. 56 



(Winter) 



Great Yarmouth . . . . 6.ix.93 



,, Aberystwyth . . . . 2.viii.92 



Marked ^ on label, but has $ bill and wing. 



