38 CONTROLLED NATURAL SELECTION 



species, but because it is coloured black like 

 another species, whose flavour it has sampled ; 

 indeed the first beetle may in reality be palat- 

 able. Thus have been accounted for many 

 cases of mimicry, and their origin, by fortuitous 

 variations of palatable insects resembling un- 

 palatable. 



To describe a colour as a warning colour, 

 is to describe it from the point of view of an 

 enemy ; it is a description of purpose rather 

 than of effect. The following table, given in 

 Professor Poulton's book, is a classification of 

 colour for the most part from this point of 

 view. Attracting colour has not been intro- 

 duced : it would fall under B after some 

 modification. The terminologies here used 

 have been placed in their appropriate places 

 in the table given on p. 36. 



A. Apatetic Colours = colours resembling some part of 



environment. 



(1) Cryptic (a) procryptic = protective resemblance. 



(b) anticryptic = aggressive resemblance. 



(2) Pseudo-sematic = false signalling. 



(a) pseudo-sematic = protective mimicry. 



(b) pseudo-episematic = aggressive mimi- 



cry or alluring. 



B. Sematic Colours = signalling colours. 



(1) Aposematic = warning. 



(2) Episematic = recognition marks. 

 [(3) 1 = attracting colour.] 



