In from five to ten days after the eggs are laid, depending 
upon the difference in the atmosphere, the eggs are hatched 
and a small green larva, or caterpillar—which is the common 
name for the larvae of butterflies—appears. This caterpillar 
is almost uniformly green, even the eyes being that color, 
Fig. 8. Egg, larvae and pupa of Cabbage Worm. Natural size. 
but by close observation we may distinguish three narrow, 
lemon-yellow stripes running the full length of the body, one 
on the back and one on either side of the body. These two 
lateral ones are not continuous but interrupted at each seg¬ 
ment of the body. 
This caterpillar is often called the “cabbage worm,” and 
is clothed with a coat of velvety green hairs, which makes 
it very beautiful when magnified under a hand-glass. 
When first hatched, the caterpillars are less than a fourth 
of an inch in length, but by feeding rapidly they increase in 
size and are full grown in about two weeks, when they meas¬ 
ure about one inch in length. 
We will see on the under side of the caterpillar a great 
many legs, and by close inspection we will find that there 
are two kinds of legs. Three pairs just back of the head are 
4 
