398 Mr. W. C. Tait on the Birds of Portugal. 



Berlengas Islands^ where I obtained eggs in 1879. No doubt 

 much larger numbers must have bred there formerly, but 

 they are now much harried by the pensioners on the old fort 

 there and fishermen, who eat the eggs. This Gull also nests 

 on the Cies Islands, Vigo. They are very numerous at the 

 entrance to the Douro, except during the breeding-season, 

 when they disappear, leaving only some young birds of the 

 previous year in their dark plumage, which remain through 

 the summer. 



258. Larus argentatus cachinnans. 



Dr. Carvalho writes me that tliere are two specimens of 

 the Mediterranean Herring Gull in the Coimbra Museum. 



259. Larus fuscus, Linn. " Gaivota das azas negras,'^ 

 Lisbon Museum. 



Common in winter along our coast. The Lesser Black- 

 backed Gull associates with the Herring Gull, and I look 

 upon it as its northern representative. The first usually 

 arrive about the beginning of August and winter with us, 

 some remaining till the end of April, and a few stragglers till 

 summer. I did not see this species on the Berlengas or Cies 

 Islands. 



260. Larus marinus, Linn. 



The Povoa fishermen sometimes catch the Greater Black- 

 backed Gull out at sea and bring it alive for sale in Oporto 

 to clear the gardens of snails and slugs and insects. Other 

 Gulls also are brought for the same purpose. There are 

 specimens in the Lisbon Museum. 



261. RiSSA TRIDACTYLA (LiuU.) . 



The Kittiwake Gull is also brought in winter by the Povoa 

 fishermen for sale. There are specimens of it in the Lisbon 

 Museum. 



262. Stercohariuspomatorhinus (Temm.). "Mandriao,'^ 

 " Saragossa," Oporto ; " Moleiro,^^ " Medonho,^'' Povoa de 

 Varzim ; " Sabao,'^ Estmoriz ; " Cagado,^^ Povoa de Yarzim, 

 Ovar, Faro; " Palheira," Cies Islands, Vigo. 



