Or 
Lo 
THE GENERA AND SPECIES OF BRITISH BUTTERFLIES. 
The under side (No. 6) is not so symmetrically decorated with the usual ocelli as P. Avion, 
but it is, nevertheless, very distinctly and beautifully marked. 
The Caterpillar (No. 7) is said to feed on several species of Vetch, and also on the wild 
Thyme (Thymus Serpyllum). 
The perfect Butterfly appears in July, and is tolerably plentiful in the localities which it 
favours, principally in chalky districts. ‘Some of the localities in which it has been found most 
regularly and abundantly are the following :—Dover, and many other places along the southern 
coast ; Newport in the Isle of Wight ; Darenth Wood, Kent; several places in Suffolk, and 
Oxfordshire ; and abundantly near Newmarket, Cambridgeshire. It is also found in the Prest- 
bury Hills, near Cheltenham, and in some localities in the neighbourhood of Winchester and 
near Great Bedwyn, Wiltshire. It must formerly have been much more abundant than now, 
as it often outnumbers many species in the Butterfly pictures, or rather stars, and other similar 
devices formed by the Spitalfields weavers in years gone by, with the specimens which they 
then captured for no other purpose. I purchased a small collection of Butterflies in a rough 
home-made cabinet a few years ago, in which one entire tray was filled with specimens of P. 
Corydon, among which were many rather striking varieties, but all in a bad condition. The 
male is sometimes so strongly suffused with brown, that it closely resembles the female, for 
which it might easily be mistaken by an inexperienced collector. 
