498 On Audouin's Gull. 
b. 2 ad. Malfatano, Gulf of Palmas (S. Sardinia), May o, 1899.— 
P. Bonorni [C.]. 
Bill 1"67 inch, coral -red, overspread here and there with 
blackish, and with two subapical black bands ; wing- 16 inches. 
c. (S ad. Island of Elba, December 22, 3900.— Prof. Daniiani [P.]*. 
" Iris brown ; bill 2 inches, coral-red, with a broad blackish 
subterminal band* and a small shade at the base of the culmen ; 
wing- 16 inches. 
" The first winter-killed specimen at the Island of Elba." 
c7, e. S and $ ad. Teulada (S. Sardinia). — P. Bonomi [C.]. 
Bill 1'8 inch ; wing 16-5 inches. 
/,(/. S and 2 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 in the winter dress 
of 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, Avith only one subterminal 
band on the bill, which measures 1-7 inch ; wing 15-7 inches. 
h-l. Three <^ ad. and two 5 ad. Cala 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 I'S to 2 inches ; wing 16 to 16'8 inches. 
on-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 
j\Ial 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 bill; 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 Prof. Damiani, of Portoferraio. 
