LAEIDjE. 



57 



336. Mediteeraneat^' Black-iieaded Gull *. Larus melanocejplialus, E. Mediter- 

 Natterer. Recorded from Yarmouth, Dec. 1886. lanean. 



Bill stouter thau last. 



In summer. Head jet-black. 



Adults. Primaries white, except the first, which has the outer web 

 margined with black. 



YoiuKj. Outer lUi'bs and shafts of first five primaries dark brown, outside 

 of inner web of third primary white. Length 15 inches. 



337. GrBEAT Black-HEADEB Gull. Larus ichthyaiitus, Pallas. One Egypt, Caspian 



occurrence: Exmouth, June 1859. to Bed Sea, 



India. 

 Bill orange-yellow, crossed near end with black bar ; head, throat, 

 and nape black ; small white mark above and below eye. Length 29 

 inches. 



338. Common Gull. Larus canus, Linnreus. Resident ; not known 

 to breed south of the Solway in Great Britain, but nests in West of 

 Ireland. 



In spring. Head and neck white ; mantle pale grey ; bill and legs 

 greenish yellow ; former yellow at point. 



In ivlnter. Head and neck streaked and spotted with brown ; legs pale 

 brown. 



Younr/. Head, neck, and uuderparts white, mottled with light brown ; 

 tail with black band at end. Primaries black or dark brown, with white 

 spots at the end or next the end. Length 18 inches. 



339. Herrixg-Gull. Larus argentatus, J. F. Gmelin. Resident. 



Head and neck white ; mantle pale grey ; legs and feet flesh-colour. 

 Young. Eeatiiers above brown, with pale edges ; tail barred with brown ; 

 uuderparts white, streaked with brown. Length 22-24 inches. 



340. Lesser Black-backed Gull. Larus fuscus, Linnisus. Resident. 



Head and neck white ; mantle slaty black ; legs and feet yellow ; pri- 

 maries nearly uniform dark brown. 



Young. Like last. Length 21-23 inches. 



341. Great Black-backed Gull. Larus marinus, LinnsDus. 

 Resident. 



Resembles last, but larger. Legs and feet flesh-colour ; distinct wedge 

 on third and foui'th primaries. 



Young. Like last. Length 26-33 inches. 



342. Glaucous Gull. Larus glaucus, O. Fabricius. Winter visitor. Arctic. 



Adult. Entirely wJiite, except grey mantle ; head and neck streaked 

 with ash-grey in winter. 



Young. Dull white, mottled with pale brown ; primaries greyish 

 white ; for a short time before assuming adult plumage the mantle is 

 entirely white. Length 26-33 inches. 



* Eggs obtained iu tlie S.W. of Spain, and stated to belong to this species, appear to 

 have been tbosc of the GriiU-billed Tern, Sterna anglica. 



