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AVIFAUNA 



161. Larus argentatus Brunnich. [Zilvermeeuw], 

 We received 19 specimens in different plumage. 



162. Larus canus L. [Kleine zeemeeuw]. 



The Museum received 9 specimens, adults in winter plu- 

 mage and young ones. 



163. Larus ridihundus L. [Kokmeeuw], 



We received 15 specimens in different plumage. On page 

 212 of the twenty-fifth volume of the Catalogue of the 

 birds in the British Museum, the late Howard Saunders 

 described a female of the black-headed gull, obtained in 

 England, that has the underparts, and even the shafts and 

 webs of the primaries, suffused with a beautiful salmon-pink. 

 On 16 October 1906 I received a female of this species, 

 caught in the province of Groningen, which shows as to 

 the shafts of the first 4 primaries the same peculiarity. 

 A male, killed at Katwijk, 21 January 1908, had the 

 breast and vent with a rosy tinge, which colour afterwards 

 disappeared. 



The so-called Larus capistratus Temminck cannot be upheld 

 as a small race of this gull. 



164. Larus minutus Pallas. [Dwergmeeuw]. 



This species, formerly breeding in our country, at present 

 visits us only on migration. Every winter a few young 

 specimens in first plumage and old specimens in winter 

 plumage are killed. Old specimens in full dress, shot on 

 spring migration, are rare. Since 1904 I received the fol- 

 lowing specimens: 



cf, winter plumage, January 1905, province of Groningen. 

 cf, winter plumage, January 1906, province of Groningen. 

 cf , winter plumage, 5 December 1906, province of Groningen. 

 cT, first plumage, 19 January 1908, near den Helder. 

 9, full dress, 1 May 1908, near Texel. 



J>Jotes from the Leyden Museum, Vol. XXX. 



