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ENTOMOLOGY 



are of little or no avail against some enemies. The weight of evidence 

 favors the theory of warning coloration in a qualified form. While con- 

 spicuous colors do not always exempt their owners from destruction, 

 they frequently do so, by advertising disagreeable attributes of one sort 

 or another. 



The evolution of warning coloration is explained by natural selec- 

 tion; in fact, we have no other theory to account for it. The colors 



A 



B 



FIG. 244..! , Anoxia plcxippns, the "model"; B, Basilarcliia arclrippns, the "mimic.' 



Natural size. 



themselves, however, must have been present before natural selection 

 could begin to operate; their origin is a question quite distinct from that 

 of their subsequent preservation. 



Protective Mimicry. This interesting and highly involved phe- 

 nomenon is a special form of protective resemblance in which one species 

 imitates the appearance of another and better protected species, there- 



