The Making of Species 



upper surface. Their flight is slow. They are 

 tough, and exhale a characteristic odour. 



Belt showed that, in Nicaragua, birds, dragon- 

 flies, and lizards seem to avoid the Heliconine 

 butterflies, as the wings of these last are not 

 found lying about in places where insectivorous 

 creatures feed, whereas wings of the edible forms 

 are to be found. Moreover, a Capuchin monkey, 

 kept by Belt, always refused to eat Heliconine 

 butterflies. 



Finn investigated the palatability of a number 

 of Indian insects. He found that most of the 

 birds with which he experimented objected to 

 the Danaine butterflies ; but they disliked still 

 more intensely two butterflies belonging to 

 groups not universally protected a swallow- 

 tail (Papilio aristolochicz) and a white (Delias 

 eucharis). 



Finn further experimented with the tree-shrew 

 or Tupaia (Tupaia ellioti\ which feeds largely 

 on insects. He found that this creature refused 

 most emphatically all these warningly-coloured 

 butterflies. It would under no circumstances 

 eat the Danaince, whereas the birds would do so 

 if no more palatable insects were offered to them 

 at the time. 



Colonel A. Alcock found that a tame Hima- 

 layan bear indignantly refused to eat a locust 

 (Autarches militaris) gaily coloured with black, 

 red, and yellow, and exhaling an unpleasant- 



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