LARIDA. “635 
THE WHITE-WINGED BLACK TERN. 
HyYDROCHELIDON LEUCOPTERA (Schinz). 
This species, which has a more south-easterly habitat than the 
Black Tern, is an irregular visitor to our shores on migration, 
especially during May and June. In those months a good many 
examples have been obtained in Norfolk, while others have occurred 
on the coasts of Sussex, Hants, Dorset, Cornwall and the Scilly 
Islands, northward in Yorkshire and Durham, and inland near 
Coventry. The first British specimen on record was, however, shot 
in Dublin Bay, in October 1841, and I have examined a bird 
in full moult killed at Ilfracombe, North Devon, early in Novem- 
ber 1870; these being the only autumnal instances known to me. 
Five more have been obtained in Ireland, all in spring and south 
or west of Dublin. 
The White-winged Black Tern has only once been known to 
wander as far as Lund in Sweden, and its northern breeding-limits 
appear to be in the governments of Lublin and Siedlec in Poland, 
south of which it is by no means uncommon on some of the 
marshes of Central and South-eastern Europe. It probably nests 
in Sicily, as well as near Massaciuccoli and Venice on the mainland 
of Italy, which it also visits on migration ; it frequents the Camargue, 
ascending the valley of the Rhone to Savoy and Central France ; 
and it passes along the east coast of Spain in considerable numbers, 
though seldom seen in the south-west and not recorded by Mr. Tait 
from Portugal. In Western Morocco it is little known, but it 
appears to breed in Algeria, Lower Egypt, Nubia, and perhaps 
