THE BIRDS OF THE BERMUDAS. 489 
probably do their one hundred miles in three hours, or even less, 
do travel to such distances from land long before they have thought 
of quitting their breeding haunts. In Castle Harbour, where there 
are a great number of Tropic-birds continually on the wing, and 
where they are left comparatively undisturbed during the day- 
time, this disappearance is, or appears to be, on a somewhat 
smaller scale. 
Larus marinus, Great Black-backed Gull.—Mr. Hurdis men- 
tions an immature example of this Gull, which was captured alive 
in the Great Sound in December, 1851, and Mr. Bartram has a fine 
specimen, also in immature plumage, shot by himself near Stocks 
Point on the 27th December, 1862. 
Larus argentatus, Herring Gull.—Without venturing to discuss 
the relative merits and demerits of the varieties, or sub-species, 
occidentalis of Audubon, and Smithsonianus of Dr. Coues, I shall 
assume that all the examples that have occurred in Bermuda may 
be assigned to the true argentatus. These Gulls occur frequently, 
not regularly, and many specimens have been obtained. One in 
my collection was shot in Devonshire Bay on the 4th November, 
and they have been seen as late as the 19th March. [This Gull 
was numerous in the autumn of 1875. I obtained several speci- 
mens, all immature, the bill in most cases measuring one inch 
and three-quarters in length. These are probably referable to the 
variety occtdentalis.—H. D.] 
Larus delawarensis (L. zonorhynchus of Audubon), Ring-billed 
Gull.—Only one on record, killed by Major Wedderburn near 
the Dockyard on the Ist January, 1849, during a north-westerly 
gale. 
Larus tridactylus, Kittiwake.—Not uncommon, but irregular 
in its visits, which occur from January to March. Most of the 
examples obtained are in immature plumage. 
Larus atricilla, Laughing Gull.—One seen, flying close past 
him, by Major Wedderburn, at Ireland Island. Mr. Hurdis records 
that one was taken alive by a fisherman in the winter of 1851-52, 
and was confined for some time in a spare room, eventually effecting 
its escape. 
Larus philadelphia, Bonaparte’s Gull.—Three are recorded by 
Major Wedderburn. One was shot by himself on the 27th January, 
1849; a second was seen by him on the 15th December, 1849; 
and another was killed on the 24th February, 1850. [Two in 
8R 
