356 Mr. D. A. Bannerman on the [Ibis, 



Hsematopus ostralegus. Oystercatcher. 



The Oystercatcher is first mentioned by Busto (Topo- 

 grafia medica, 1864, p. 105). 



Serra, according to Cabrera, also includes it (Ornithologia 

 Canaria, 1879-1882). 



Cabrera remarks (Catalogo, 1893, p. 57) that it is an 

 accidental visitor cited by Busto and Serra, but gives no 

 further details. 



Larus gelastes. Slender-billed Gull. 



This Gull is first mentioned from Teoerife by Momp6 

 (Catalogo de las Aves de Tenerife, p. 258). He mentions 

 no specific occasion when it was taken. 



Cabrera includes it (Catalogo, 1893, p. 66) on Mompo's 

 authority. 



Although the Slender-billed Gull might easily occur in 

 the Canaries, it is more probable that the bird observed 

 was Larus ridibundus in winter plumage, which somewhat 

 resembles it at this season. 



Larus minntus. Little Gull. 



Mompo is again made responsible for the inclusion of this 

 Gull in the Canarian list. 



Cabrera includes it in his liat (Catalogo, 1893, p, 66) on 

 Mompo's authority, but I can find absolutely no reference 

 to Larus minutus in the latter's work (Catalogo de las Aves 

 de Tenerife, 1876). 



Sterna albigena. White-cheeked Tern. 



This Tern, Sterna albigena Licht., is included by Polatzek 

 (Orn. Jahrb. 1909, p. 133) in his list of birds not properly 

 authenticated ; he notes that it is rare in the Archipelago, 

 but does not say from whom he gets his information. He 

 may have confused Sterna senegalensis Swains. ( = -iS. macrura) 

 and recorded by Cabrera (Catalogo, p. 67) with Sterna sene- 

 galensis Heugl. { = S. albigena). 



In any case the record is worthless, S. albigena is extremely 

 unlikely ever to have occurred. 



