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 aristolochie) and a white (Delzas 
eucharis). 
Finn further experimented with the tree-shrew 
or Tupaia (Zupaza elhotz), 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 Daxaine, 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 
(Aularches mektarzs) gaily coloured with black, 
red, and yellow, and exhaling an unpleasant- 
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