408 LARIDAS 
barred with smoke-brown, the feathers being edged with 
greyish-buff; three outer primaries, black on ‘both sides of 
the shaft, fourth to the seventh primaries, greyish-white, 
barred with black ; remaining primaries, white; outer tail- 
feathers, pure white ; remaining ones, white banded at their 
extremities with dark brown. 
Beak. Black. 
FEET. Red. 
Ir1DES. Dark brown. 
Hees. ‘‘ Propagation as yet unknown ”’ (H. Saunders, 
Cat. Birds Brit. Mus., vol. xxv, p. 169). 
AVERAGE MEASUREMENTS. 
TOTAL LENGTH ... aA “oH drs) hate 
WING LO 25ees 
BEAK 1 a 
'TARSO- METATARSUS 1°25 
BONAPARTE’S GULL. Larus philadelphia (Ord). 
Coloured Figures.—Gould, ‘Birds of Great Britain,’ vol. v, pl. 
65; Dresser, ‘ Birds of Europe,’ vol. ix, pl. 717; Lilford, 
‘ Coloured Figures,’ vol. vi, pl. 17. 
Six examples of this American species have been 
recorded as visiting the British Isles. The first was taken 
in Ireland on the River Lagan above Belfast, on February 
Ist, 1848, and identified by Thompson (Nat. Hist. Ivel., 
vol. 11, p. 317); it proved to be a male in nearly mature 
winter-plumage, and is now preserved in the Belfast 
Museum. The second bird was procured in Scotland 
on Loch Lomond, two years later (April, 1850), by Sir 
George H. Leith-Buchanan (‘ Zoologist, 1851, p. 3117, and 
1867, p. 966). 
In 1865, two specimens were obtained in England; one 
in Falmouth Harbour, January 4th (Rodd, ‘ Zoologist,’ 
1865, P- 9501); the other at Penryn, on January 10th 
(Rodd, ‘ Birds of Cornwall, p. 168). In November, 1870, 
an example was obtained at St. Leonards, Sussex (Borrer, 
‘Birds of Sussex,’ p. 262), while the latest occurrence 
