PKOTECTIVE AND AGGKESSIVE MIMICRY 257 



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

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



Pig. bi^.— 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.' 



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 v/hom he showed 

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

 possessed the features which are characteristic of a 

 poisonous serpent.^ 



» Loc. cU. pp. 110-12. 3 Loc. cit. p. 509. 



