35G 



THE STRUGGLE FOR EXISTENCE 



cause them to resemble twigs still more closely. See Figure 

 234. 



The caterpillars of certain moths known as the looping 

 caterpillars, or measuring worms (Fig. 235), show a re- 

 markable resemblance to 

 the branches on which they 

 live. They are colored like 

 the bark and have the re- 

 markable habit of holding 

 fast by their false hind legs, 

 while the long slender body 

 projects outward like a 

 twig. 



Perhaps one of the most 

 remarkable resemblances is 

 the Kallima, or leaf butter- 

 fly, of India. Figure 236 

 shows the remarkable simi- 

 larity of this insect to a 

 leaf. When it alights on a 

 branch, its wings are held 

 vertically with the upper 

 sides folded together so 

 that only the under sides 

 show. Note the dark line 

 running through the middle 

 of the wings like the midrib 

 of a leaf. Note also the 

 small projection on the end 

 of the wing that rcseiul)]os the petiole of a leaf. The legs 

 are usually more or less hidden, and, more than that, are 

 so colored that they are inconspicuous. The upper sides 



Fig. 235. — Looping caterpillar on a 

 branch. 



