132 
HAWTHORN BUTTERFLY. 
tia, which it is further separated from by the equal 
length of the second and third joints of the palpi, 
and the shortness of the former joint compared with 
the basal one. The strong nervnre that surround.' 
each wing has never before been noticed.” * 
The English name sufficiently describes this spe 
cies, and readily distinguishes it from all its asso 
ciates. It is about the size of the Common Cabbage 
Butterfly, the wings somewhat transparent, and of 
a uniform white colour, with the nervures black. 
There is also a black line round the outer edge of 
the wings, and generally a few dusky triangular 
marks on the outer margin of the upper pair. The 
caterpillars are black for some time after they are 
hatched, but soon become partially clothed with 
hairs, and striped with reddish-brown on each side 
of the body. (Fig. 3, PI. III. represents a full- 
grown caterpillar of this species.) They are grega- 
rious, and live for a time under a net- work of silk, 
which they spin for their protection. Their favou- 
rite food is the leaves of the Hawthorn, but they like- 
wise attack fruit-trees, and have been known to 
commit considerable damage in orchards. This but- 
terfly is by no means generally distributed through 
England, and is wholly unknown in Scotland ; but 
it has occurred plentifully in the following places, 
and is occasionally observed elsewhere: — New Fo- 
rest, Hampshire, Chelsea, Coombewood, Enborne, 
Berkshire, Dorsetshire. It is by no means a scarce 
* Curtis, British Ent. viii. 360. 
