162 NORTH AMERICAN INSECTS. 
a beautiful light-green color, prolonged behind in the form 
of a tail. They also expand from three to five inches. 
The caterpillar of this moth, resembling almost exactly 
that of the Polypheme in size and color, lives on walnut 
and hickory trees, and manufactures its cocoon in the same 
manner. At the approach of cold weather these cocoons 
also fall to the ground with the leaves of trees, and those 
who wish can gather them in the fall or spring. Their 
silk, also, is of the same quality as that of the Cecropia 
and Polypheme Moths. 
The Prometrnea Morn (Attacus Promethea), Fig. 37, the 
Figure 37. 
The Promethea Moth—Male. 
male, and Fig. 38, the female. As is often the case with 
beasts, birds, and other insects, the male of this moth differs 
very much from the female in colors. The male insect is 
of a dark brown, and the female of a light reddish-brown 
color. Both are ornamented with a black spot, somewhat 
like an eye in shape, upon the fore wings, and the female 

1 ——— i. 
