THE BRIMSTONE 
34i 
ground colour of 
greenish-white, 
the other of a 
yellowish hue, es¬ 
pecially the apex 
of the fore wing 
and margin of the 
hind wing. The 
orange spots are 
as in the male, but 
rather lighter in 
colour. 
In both sexes 
the head, palpi 
and antennae are 
a dull, deep pink ; 
the thorax is clothed with long, silky, whitish hair. 
Life of Imago. The Brimstone is the longest lived of all 
the British butterflies ; its life frequently extends for a year. 
I have seen old, very worn, hibernated specimens on the 
wing as late as the latter part of July, in company with numbers 
of freshly-emerged examples. 
Aberration. This butterfly is but little subject to aberra¬ 
tion. Occasionally occur gynandromorphous examples having 
the wings of one side of male colouring and the opposite side 
of female colour. Other specimens, again, are more or less 
streaked or blotched with colouring of the opposite sex. In 
this country have occurred two or three specimens with a 
suffusion of deep orange over the central portion of the fore 
wings, approaching the Continental species G. cleopatra. 
These and other striking forms of aberration are very rare. 
h 
1, Seventh segment of the larva, just emerged. 
2, Dorsal hair of the larva, just emerged. 3, Dorsal 
spines of fully-grown larva (highly magnified). 
