CHAPTER VII 



DEFENCES OF INSECTS OR PROTECTION AS DERIVED 

 FROM COLOUR (continued] 



A conspicuously coloured group Objection to colour Different 

 modes of insects of maintaining existence ; possession of 

 nauseous properties, irritating hairs and spines, the sting, 

 hardness of substance, wonderful vitality, capacity for 

 increase, attitudes Association of bright colour with dis- 

 tasteful qualities Bright colour as a warning ; its value 

 Various combinations of means of defence Resemblance 

 between Warning Colours and patterns ; determining causes 

 of the repetition Distinction between Warning Colours and 

 those produced by courtship Sexual colouring made use 

 of for warning ; its similarity Conspicuous and nauseous 

 but non-vital parts One meaning of broad expanse of wing 

 of showy butterflies Mimicry Bates first to explain the 

 facts Butterflies that are objects of mimicry in tropics 

 their unpalatability indicated by conspicuousness and 

 abundance True Mimicry as distinct from all warning 

 appearances The term mimicry Mimicry a phase of 

 Protective Resemblance Mimicry of American butterflies, 

 of the Asiatic, of the African, in British Lepidoptera 

 Especially prominent in female ; interpretation of pheno- 

 menon Affords confirmation of theory that Mimicry is 

 produced by natural selection " External conditions," 

 " heredity " An explanation of sexual difference of form 



