38 



GENERAL PRINCIPLES OF ZOOLOGY 



they contain bad-tasting fat bodies. Another species of butterfly accom- 

 panies them (Pieridffi), which does not taste bad, and yet is not eaten, 

 because in flight, in cut, and marl^ing of the wings it imitates the Helic- 

 onia so closely that even a systematist might easily be confused (fig. 13). 

 In a similar way bees and wasps, feared on account of their sting, are 

 imitated by other insects. In Borneo there is a large black wasp, whose 



Fig. II. — Leaf-butterflies. A, Kallima parahcta, fljans;: a, at rest (after Wallace). 

 B, Siderone slrigosus, ilying; b, at rest (after C. Sterne). 



wings have a broad white spot near the tip (Mygnimia avkuhts). Its 

 imitator is a heteromerous beetle {Coloborliomhus J'asciatipennis) , which, 

 contrary to the habit of beetles, keeps its hinder wings extended, showing 

 the white spot at their tips, while the wing-covers have become small 

 oval scales (fig. 14). With many species the mimicry occurs only in dre 



