160 



BOYS AND GIRLS IN BIOLOGY. 



stripes ; and then, again, some are black, with light spots, 

 or dark red, with brown spots. The very woolly-looking 

 ones, and some of those with the highest colors, are the 

 Mora-caterpillars. The difference between moths and 

 butterflies we shall soon see. Some people think that 

 all the quiet, brown creatures are moths, and all the gay, 

 fancy-looking ones are butterflies. But this is a mis- 

 take. If you look carefully at a caterpillar, you will 

 find probably that its body looks as if it were made up 

 of rings, and, if you count these rings, you will usually 

 find about thirteen (Fig. 135). The first ring is gener- 



Fig. 135. 



Horns. 



ally very small, and forms the head. The eyes are 

 placed on the front part of the head, and look like two 

 tiny black spots ; but the jaws and mandibles are strong 

 and horny, and work from side to side instead of up 

 and down. The first three rings behind the head are 



