LYTHRIA PURPURARIA. 145 
rounded at either end, yet one end is rather rounder 
and wider than the other, and there is a slight depres- 
sion on either side; the embryo larva hes round the 
circumferent margin where the egg is thickest. 
On the 10th two larve hatched, and were whitish, 
very slender, and twisted ina coil when disturbed. The 
whitish body was marked on each side of the back 
with a darkish dull green subdorsal stripe, and the 
head striped. They became very pale as they lay up 
to moult; but after the second moult the sides of the 
body seemed composed of blackish stripes, with a 
narrow dorsal stripe of whitish between them, a 
spiracular stripe of white, and a stripe of pale green 
on the flat belly. By August 3rd they were five lines 
long, very slender, three in number, committing 
ravages on the leaves by eating large portions out of 
them. The dorsal line begins of a creamy white on 
the thoracic segments, and from thence 1s hight green, 
then darker green, but on the eleventh and twelfth 
segments is again light green and stouter; the sub- 
dorsal is also creamy or greenish-white on the second 
seoment only, but from thence can be with difficulty 
distinguished from the very dark blackish-green of 
the back, which forms a length-stripe ; below the sub- 
dorsal is a stripe of black, followed by the inflated 
spiracular stripe of greenish-white ; the belly is ightish 
green, having twin lines of darker green on either 
side, and on a ridge along the middle a paler line 
though faint; the head is greenish white in front, and 
with the dark side-stripes of the body continued low 
down on each lobe; papille gereenish-white; anal 
plate dull black; all the upper surface of the body is 
dull or velvety, but on the belly it elistens a little. 
On the 10th they were laid up to moult, just as the 
plant began to collapse from the swarms of plant-lice 
attacking it, which covered the entire plant, and were 
perpetually running over and worrying the larve; 
and on the 12th I found two had dropped off, ap- 
parently dead, and the third was hanging down in 
VOL. Vit, 10 
