WARNING COLOEATIOK. 



189 



" affords a wonderful example of what natural selection can 

 accomplish." The very same resemblance, though serving a 

 different purpose, is shown by several greyish white moths, 

 such as the common Carpet moth, so abundant in gardens ; 

 these insects rest with their wings expanded and pressed against 

 the leaf, and are by no means unlike the excrement of a bird 

 which has fallen from a height and been therefore flattened 



Fig. 



-Fishing Frog 



out. Mr. J. P. Barrett * has also compared the young cater- 

 pillar of the rare Alder moth {Acivw/cta alni) to the dropping 

 of a bird. In these cases the theory is that the resemblance 

 protects the insects from birds. 



To return to the subject of the attraction of special markings. 



Mr. Poulton includes among his instances of "Alluring (Mora- 



tion " which have been quoted above the waving tentacles of 



the Fishing frog (see woodcut, fig. 22) ; the fish is provided 



* Entomologist, vol. x., p. 238. 



