CORRESPONDENCE. 
ss 
legged Warblers (Hyhia loquax)^ Blackcap! Fauvets, and Willow Warblersv 
arrive at the first, or perhaps at the first and second comings; tor a few of one 
or two of these generally precede the appearance of all these kinds. At the next 
batch come the rest of the species enumerated, together with most of the 
Locustells, Cuckoos, Redstarts, and Nightingales, many of the Chimney, and 
some of the Window, Swallows, the earlier Whitethroated and Whitebreasted 
Fauvets, Sedge and Marsh Reedlings, Whin Chats, and perhaps, an early Garden 
Fauvet or two. Then at the following coming, along with the remainder of the 
above, arrive the Wood Warbler, the Grey Flycatcher, and the Swift; and 
another period intervenes ere the Nightjar arrives. There indeed appear to be 
alternate fortnights uf arrival and non-arrival, corresponding with the age of the 
moon, the migration being also secondarily subordinate to the state of the weather, 
being promoted by a southerly breeze, and much retarded by gales from the 
opposite direction. These will be found to be about the us-ual periods, selecting 
the medium week, which may form the fortnight, according to circumstances, 
with the week preceding, or following it; namely, first week in April, Blackcap! 
Fauvet, Darklegged Warbler, Fallow Chat, Bank Swallow, Willow Warbler, 
Wryneck ; second week, to the 15th ;—Cuckoo, Nightingale; third week, to the 
29th :—Garden Fauvet, Wood Warbler; 13th of May:—remainder of the small 
birds. 
Tootingj Surrey^ April 21, 1836. 
CORRESPONDENCE. 
PAPILIO PODALIBIUS A BRITISH INSECT. 
To the Editor of the Naturalist. 
Respected Friend,—Having noticed a good deal of dissension respecting the 
genuineness of Papilio podalirius as a British insect, I take this opportunity of 
announcing, through the medium of your Journal, that I myself possess a pair 
which I believe to be British. I met with them under the following circum¬ 
stances:—Happening to be at Portsmouth, the summer before last, for the first 
time, I enquired, as is my usual practice on going to a town before unvisited by 
me, for collectors of Natural History specimens. I soon found one, and among 
the collection was a pair of the above-named species. The owner assured me 
they were British, that they were caught by a person she employed in the neigh¬ 
bourhood, and that she set them up herself. As it would not be worth her while 
to have imposed upon me in this instance, and especially as she did not seem 
aware of the value of the specimens, I feel no doubt but they were really British. 
