BRITISH WARBLERS 
tipped with the whitish colour. The outer edge of the flight- 
feathers are narrowly margined with yellowish green, a trifle 
broader and lighter on the innermost secondaries. The under 
parts of the wings are grey, margined with a whitish colour. 
The under wing-coverts and axillaries are white, the latter 
being tinged with sulphur yellow. The upper part of the tail 
is brownish grey narrowly edged with olive green, and the 
shafts reddish brown, the under part light grey and the shafts 
white. The under parts of the body are whitish, striped with 
very indistinct sulphur yellow. The belly is pure white, the 
under tail-coverts light sulphur yellow, and the sides of the 
breast and flanks washed with light olive grey and striped 
with olive yellow. The bill is dark horn colour, and the base 
of the lower mandible ochre. Tarsus and toes are fleshy 
brown. 
GEOGRAPHICAL DISTRIBUTION. 
To Europe it is only an accidental visitor on migration. 
There are twenty records of its occurrence in Great Britain, 
nine of which have been in England, seven on Fair Isle, and 
one respectively at Sumburgh Head, Skerryvore Lighthouse 
in the outer Hebrides, Tearaght Lighthouse off co. Kerry, and 
Trescoe in the Scilly Isles. 
There is only one record from France, one from Holland, 
and one specimen was killed at a lighthouse in Denmark, but 
on the island of Heligoland numerous specimens have been 
obtained, principally on autumn migration. To Germany, 
Italy and the Austro-Hungarian Monarchy it is only a rare 
strageler, but further east it gradually becomes more common. 
On migration it visits the districts round St. Petersburg, the 
valley of the Northern Dwina and the Province of Orenbure. 
The western breeding limit seems to be the Province of Perm. 
It occurs in the valleys of the Rivers Ob and Lena, and is 
very common in the valley of the Yenisei up to 70° northern 
latitude. It is also found near Kultuk, Tsurukaitui, along the 
2, 
