The Colours of Animals. 



97 



clear that when the insect is somewhat larger, the 

 longitudinal lines are a great advantage, while 

 subsequently diagonal ones become even more 

 important. 



5. The next point is the colour of the rrrafuinc 

 caterpillars. We have seen that some are green, and 

 others brown. The green ones are obviously merely 

 those which have retained their original colour. 



H 



