36 LARIDZ 
291. Larus Fuscus, Linn. Lesser Black-backed Gull. 
The nearest nesting place to the mouth of the Humber is on the 
Farne Islands. In the autumn, winter and spring, to the end of March, 
immense numbers frequent the Humber and Lincolnshire coast, with the 
fringing belt of sand banks. In summer, also, some adults remain, but 
the bulk of the birds are then in immature plumage. 
292. Larus MARINUS, Linn. Great Black-backed Gull. 
Both the old birds and the young are back from their breeding 
quarters to the Yorkshire and Lincolnshire coasts early in July, and con- 
tinue throughout the winter to April. Immature birds and some adults 
on the coast during the summer. 
293. Larus GLAucus, Fabricius. Glaucows Gall. 
Winter visitor ; both adults and immature (the latter more frequently) 
of this Arctic species occur every winter along the coast between Flam- 
borough Head and Saltfleet Haven. 
294. LARuUS LEUCOPTERUS, Faber. Jceland Gull. 
Winter visitor; both the adult and immature are occasionally met 
with from October to February, but not nearly so frequently as the 
preceding. I saw on May 8th, 1894, an almost pure white Iceland gull 
off the north landing at Flamborough, picking up refuse from the fishing 
boats, and very unsuspicious. 
295. Rissa tripactyLa (Linn.). Kittiwake Gall. 
Resident ; nests in great numbers on the Flamborough cliffs. Both 
the old and young are met with at sea during the year. On November 
15th, 1887, an almost pure white kittiwake was shot in Bridlington Bay, 
being the second obtained in that year. The young are on the wing 
by the third week of July. 
’ 
296. PAGOPHILA EBURNEA (Phipps). Jvory Gull. 
Recent occurrences of this Arctic species on the coast are: Filey, 
August, 1875, an adult male shot a mile and a half from shore 
[‘ Zool.,’ 1875, p. 4689). Tiley, September, 1880, an adult male in 
perfect mature plumage, and in the same month a young bird in the 
mottled plumage [‘ Zool.,’ 1881, p. 108]. March 29th, 80th and 81st, 
one, an adult, seen for three days on the wing beating to and fro along 
the coast near Cleethorpes |‘ Zool.,’ 1888, p. 258]. Mr. I. R. Larken, of 
the Minster Yard, Lincoln, has one which is said to have been shot 
“forty years since ’’ on the Lincolnshire coast (J. H. Gurney, i Uitt.). 
Subfamily STERCORARIIN AL. 
997. STERCORARIUS CATARRHACTES (Linn.). Great Skua. 
Of exceedingly rare occurrence ; I have notes of only seven between 
1864 and present date, ranging from June to the end of October and all 
within a few miles of Flamborough Head; is seen more frequently far 
out at sea and not approaching the coast or along the shore line. 
