36 THE GENERA AND SPECIES OF BRITISH BUTTERFLIES. 
The perfect insect of the first brood generally leaves the Chrysalis in May, and the second 
in August. It isa very common species, being found in all parts of the country, even far 
towards the North of Scotland. Epping, Plymouth, Tenterden, and other places are mentioned 
as localities in which it has been recently taken in abundance. 
There are varieties in which the dark marks on the upper side of the wings are nearly 
united, giving the whole surface a rich deep mottled brown appearance. 
Considerable additional interest might be gained in forming a collection of the British 
Fritillaries, by the study, at the same time, of some of their foreign relatives, many of the 
exotic species being extremely beautiful. The study of foreign genera, at the same time with 
the British, also gives the student a better general idea of classification and clearer notions upon 
the scientific location of our native species; the foreign kinds frequently forming links which 
exhibit, in an instructive manner, the methods upon which the classification of Lepidopterous 
insects has been pursued. 
