408 LARID.E 



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. 



IKIDES. Dark brown. 



EGGS. "Propagation as yet unknown" (H. Saunders, 

 Cat. Birds Brit. Mus., vol. xxv, p. 169). 



AVERAGE MEASUREMENTS. 



TOTAL LENGTH 13'5 in. 



WING 10-25 



BEAK 1 ,, 



TARSO-METATARSUS T25 , 



BONAPARTE'S GULL. Larus Philadelphia (Ord). 



Coloured Figures. Gould, 'Birds of Great Britain,' vol. v, pi. 

 65; Dresser, 'Birds of Europe,' vol. ix, pi. 717 ; Lilford, 

 * Coloured Figures,' vol. vi, pi. 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 

 1st, 1848, and identified by Thompson (Nat. Hist. Irel., 

 vol. iii, 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 (Kodd, ' Zoologist,' 

 1865, p. 9501) ; the other at Penryn, on January 10th 

 (Eodd, ' 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 



