LEPIDOPTEROUS INSECTS. 19 
pillars, which were hatched from eggs the 12th of 
July, in the following order. Their first casting of the 
skins occurred on the 14th, the second on the 17th, 
the third on the 21st, and the fourth on the 26th. 
They then continued to eat and grow till the 15th 
of August, when, haying completed their growth, 
and reached their full age as caterpillars, they left 
off eating, and prepared for entering upon their 
second stage of life, namely, that of chrysalis, which 
has no resemblance to the caterpillar. This change 
took place on the 17th of August. 
“Tt hence appears, that the first stage of life, or 
the caterpillar state of this insect, only lasts for five 
complete weeks ; but I must remark, that in rear- 
ing the caterpillars for the purpose of observing their 
changes, they must have fresh food every day, and 
in a warm day twice, otherwise they will not 
thrive. 
«* The cover of the box where they are kept, 
ought to have small holes in it for the admission of 
fresh air ; or it may be covered with crape or gauze. 
It ought not to be shallow ; for if so, the wings of 
the butterfly, when it comes forth, may be bent or 
injured. 
« We have thus seen our insect in its first stages 
of life ; but it is destined to arrive at a higher stage 
of existence, and is born to be admired, though it 
does not reach this stage till it has undergone sick- 
ness and suffering, with hardly any apparent sign 
