yj 



THE EVOLUTION THEORY 



claw-like IVet (/'), which, piully pressed close to the head, partly 

 stundin<2^ out from it, pve the anterior end of the caterpillar the 

 appearance of two terminal buds, while various little pointed, knot- 

 like warts, scattered over the body, represent the sleeping- buds of the 



Fig. 17. Caterpillar of Se/enm ^efraZMnar/a, seated on a birch twig. Z^, head. ^, feet. 

 »n, tubercle, resembling a 'sleeping bud' ; nat. size. 



little twig. Who has not at one time or other taken such a cater- 

 pillar for a little branch, and not inexpert observers only, but even 

 trained naturalists? Many a time I have not been able to make 

 quite sure of wiiat I had before me until I touched it ! 



