98 Bugs, Butterflies, and Beetles 



call it the io miller, which is the grown-up io 

 caterpillar. 



Mr. Io (Fig. 89) is smaller than his wife (Fig. 

 90) and not so gaudy, but he has nature's beauty 

 spots on his two hind wings, these spots, however, 

 being much brighter and larger on ]Mrs. Io. The 

 gentleman and lady differ both in color and size. 

 The gentleman is of a deep Indian yellow with 

 two wavy lines running bias across its fore-wings 

 toward the back edge, zig-zagging near the bot- 

 tom; these lines are of a reddish-purple color. 



The back wings or second wings next to the 

 body are purplish-red, and near the back edge 

 there is a curved band of the same color. The 

 beauty spot is made by a big blue blot with a black 

 border and a simple dash of white, and the beauty 

 spots on the skirts of lady io are much larger 

 than those on gentleman io's coat-tails. When 

 these moths are at rest they fold up their wings 

 over their back, making a roof like that of a house, 

 in place of spreading them out flat, as do the 

 moths previously described. 



The caterpillar spins a cocoon (Fig. 88) on 

 the ground, picking up leaves and rubbish of any 

 kind and fastening it to the cocoon. The cocoon is 



