498 On Audouin's Gull. 



b. 2 ad- Mixlfatano, Gulf of Palmas (S. Sardinia). May o, 1899.— 



P. Boiiomi [C.]. 



IJill 1G7 iuch, coral-red, overspread here and there Avith 

 blackish, and with two subapical black bands ; winj,^ 16 inches. 



c. S ad. Island of Elba, December 22, 1900.— Prof. Daniiani [P.]*. 



" Iris brown ; bill 2 inches, coral-red, with a broad blackish 

 subterniiual band and a small shade at the base of the culnien ; 

 wing 16 inches. 



"The first winter-killed specimen at the Island of Elba," 

 d,e. (S and $ ad. Teulada (S. Sardinia). — P. Bonomi [C.]. 



Bill 1'8 iuch ; wing 16"5 inches. 

 f,(j. cT and 5 ad. Island of Mai di Ventre (W. Sardinia), March 

 1901.— E. Arrigoni Degli Oddi [C.]. 



The male has only one large subapical band, the head, the lores, 

 and sides are spotted with greyish as much as iu the winter dress 

 tif the Common Gull. I think that this is an immature specimen, 

 and not an adult in winter dress. It is also like that described 

 by Mr. Saunders in lacking the white spot on the outermost 

 primary. This remarkable specimen measures : bill 2 inches, 

 wing 16*3 inches. 



The female is a white-headed bird, with only one subterniiual 

 band on the bill, which measures 1'7 inch ; wing 15"7 inches. 

 h-l. Three S ad. and two 5 ad. Gala Galera (Gulf of Palmas), July 

 11, 1901, and Island of Vacca (S.W, Sardinia), July 12, 1901.— 

 P. Bonomi [0.]. 



All with two black subterminal bands on the bill, which 

 measures PS to 2 inches ; wing 16 to 16'8 inches. 

 vi-p. Two S young and two 5 young. Island of Vacca, July 12, 1901. 

 —P. Bonomi [C.]. 



Those which are described above. 



All of the specimens (except the male from the Island of 

 Mai di Ventre and the four young birds) are wholly white- 

 headed, with the outermost primary shewing a small white 

 subapical spot on the inner web. I think that the greyish- 

 brown streaks on the head and neck are a true mark of im- 

 maturity, and not a peculiar winter dress, which I believe 

 to be like the full breeding-plumage. I have mentioned that 

 some specimens shew only one dark subterminal band on 

 the Ijill, and others two. I think that, generally speaking, 

 in the adult bird the two are combined together, and so 



* For the gift of this beautiful specimen I am particularly indebted 

 to my friend I'rof. Damiani, of Portol'erraio. 



