164 
NYMPHALIDAE 
crawling out of burning rubbish in a wood at Castle Eden 
Dean, Durham, during mid-winter in 1869. One was seen 
at Weybridge, Surrey, on March 7th, 1910, and one was found 
in a semi-torpid state clinging to the trunk of a Birch tree 
at Box Hill, Surrey, on April 17th, 1881. Other authentic 
instances are on record. The Camberwell Beauty is single 
brooded. 
Hibernation. This butterfly apparently remains on the 
wing later in the autumn than N. polychlorus, and enters into 
hibernation in October. From the above records, it obviously 
selects hollow trees, wood faggots and similar retreats for its 
winter quarters. 
It may here be stated that it was always considered by 
the earlier writers, as well as by others, that all British 
antiopa had white borders to the wings, hence the name 
“ White-bordered.” This is generally due to the fading of 
the yellow colouring of the marginal bands found in freshly- 
emerged specimens. All hibernated examples, whether occur¬ 
ring in this country or abroad, have the margins more or less 
white, as also have.most of the specimens taken in Britain 
in the autumn. Occasionally British-caught individuals have 
been in a fresh condition with straw-yellow borders. A 
specimen I captured some years ago had the margins of a 
rich straw-yellow. It had apparently quite recently emerged 
and had migrated shortly afterwards to this country. 
Some years ago I bred from French parents about 1800 
fine specimens of N. antiopa. All had the marginal borders 
varying from straw-vellow to rich tawny-yellow or amber 
colour. 
• N. antiopa apparently does not migrate to this country 
in the spring, a surmise strengthened by the fact that there 
is no authentic record of either the larva or pupa having 
been found in a wild state anywhere in Britain. Otherwise, 
if the spring butterflies were immigrants from countries 
where they are common, they would without doubt lay their 
eggs after their arrival here. As I have before pointed out, 
the scarcity of hibernated specimens is the obvious reason 
for this butterfly not breeding here. The hibernated speci¬ 
mens occur, as a rule, only singly and in widely-separated 
localities. This prevents the sexes from finding each other, 
