62 



STUDIES IN EVOLUTION 



and resembling a woody excrescence with projections or 

 spiniform processes (figure 47). Other spiny spiders of the 

 Epeiridse probably have similar protective mimetic features ; 

 as Epeira spinea and Acrosoma arcuata. 



The larva of the Early Thorn Moth, as described and illus- 

 trated by Poulton,"^ bears a strong resemblance to the twig 

 upon which it rests, even to the spiniform processes, axils, and 

 buds (figure 48). Packard ^^ cites a striking case of mimicry 



49 



Figure 49. — Australian Pipe-fish (Phyllopteryx eques) and frond of sea-weed 

 in lower right-hand corner ; showing mimicry. \. (After GUnther.) 



in the caterpillar of another genus of moth (Schizura), where 

 the spines and tubercles resemble the serrations of a leaf 

 "so that, when feeding on the edge of a leaf, the Schizurae 

 exactly imitate a portion of the fresh-green serrated edge of 

 a leaf including a sere, brown, withered spot, the angular, 

 serrate outline of the back corresponding to the serrate out- 

 line of the edge of the leaf." 



The Australian Pipe-fish Phyllopteryx, previouslj^ men- 

 tioned under the head of spines for protection, shows the 



