HIGH BROWN FRITILLARY 
109 
Segment of the larva of the 
High Brown Fritillary just after 
hatching (magnified). 
and August, but in fine and ex¬ 
ceptionally hot summers it is fully 
out during the latter part of June. 
In the hot summer of 1893, I ob¬ 
tained at the end of June eggs of 
this butterfly, from a few which 
abnormally hatched in August. 
One larva fed up and pupated on 
October 13th, and produced a 
male imago on November 21st. 
But in a wild state there appears 
to be no record of an example of a 
second brood having occurred in 
Britain. 
Hibernation. The High Brown 
passes the winter months in the 
egg stage, which extends to eight 
months. 
Egg Laying. The eggs are laid singly during the latter 
part of July and August on various parts of the food plant, 
which appears to be entirely restricted to the Dog Violet 
(Viola canina), but chiefly the stems and stalks of the leaves 
are selected for the eggs. 
Egg. The egg is o*8o mm. high, of a slightly pyriform shape 
with from thirteen to fifteen 
boldly sculptured longitu¬ 
dinal keels. In most ex¬ 
amples counted, only eight 
of these run the entire length; 
the remainder either branch 
off the main keels, about 
one-fourth down, or else rise 
separately between them. 
Each keel is ribbed trans¬ 
versely and the ribs are con¬ 
tinued across the intervening 
spaces. The keels resemble 
white glass and are elevated 
T,- u r> ~ „ on the crown and disappear 
1 he High Brown Fntillary at rest ... , , 
on an Oak branch. on reaching the base. When 
