154 BIRD GALLERY. 
No. 48. SWALLOW. (Ilirundo rustica.) 
Though this well-known summer visitor has been known to arrive in 
the south of England as early as the 21st of March, the usual date of its 
appearance is the second week in April, after which it is generally dis- 
tributed throughout the British Islands till September and October or 
even later. The open nest of mud, lined with dry grass and feathers, is 
usually placed, as in the present instance, on the horizontal surface of a 
joist, which supports the rafters of a barn or outhouse. The eggs are 
white, spotted with lavender-grey and reddish-brown, and from four to 
six in number. ‘Two broods are reared in the season ; the first, for which 
the eggs are usually laid early in May, is able to fly by the end of June, 
while the second is generally fully fledged by September. The young 
birds which are placed on the top section of the tiles formed part of the 
first brood, and were still being occasionally fed by the parents when 
these were alveady engaged in incubating their second set of eggs. 
Sussex, July. 
Presented by W. R. Ogilvie-Grant, Esq. 
No. 49. HOUSE-MARTIN. (Chelidon urbica.) 
This summer visitor is generally distributed throughout the British 
Islands, usually arriving about the middle of April and departing in 
September and October, though considerable numbers are often to be 
seen even later in the year. ‘The mud-nest, shaped like the half of a cup 
and lined with fine straw and feathers, is attached to some wall or rock, 
beneath eaves or other projections, and is entered by a hole in the rim. 
The same spot is occupied year after year, the nest, if intact, being 
merely renovated. The pure white eggs are four or five in number, 
and two, or even three, broods are reared in a season. 
Sussex, July. 
Presented by W. R. Ogilvie-Grant, Esq. 
Nos. 50 & 51. DARTFORD WARBLER. 
(Melizophilus undatus.) 
A local resident in the south of England and more rarely met with in 
the valley of the Thames and in some of the Midland counties. It does 
not migrate, and in severe winters, like that of 1880-81, its numbers are 
lable to be greatly reduced. The favourite haunts are dense patches of 
