PROTECTIVE AND AGGRESSIVE MIMICRY 257 



ants it resembles, so that the Mimicry is probably pro- 

 tective. Synemosyna formica (see fig. 54) is even more 



Pro. 54. Synemosyna formica, an ant-like spider (from Peckham). 



like an ant than S. picata ; it also holds up its second 

 pair of legs as antennae, and its walk is described as 

 very different from that of closely allied spiders. 1 



Insects which mimic Vertebrate animals 



We finally reach the most remarkable cases of Pro- 

 tective Mimicry, in which the defenceless form lives 

 upon the reputation of some dangerous animal belong- 

 ing to another sub-kingdom. 



Mr. Bates describes a South American caterpillar 

 which startled him, and everyone to whom he showed 

 it, by its strong resemblance to a snake, and it even 

 possessed the features which are characteristic of a 

 poisonous serpent. 2 



1 Loc. tit. pp. 110-12. 2 Loc. dt. p. 509. 



