xlviii 



Resemblance in certain Long-horned Grasshoppers (Trans. 

 Ent. Soc, 1922, p. 269), said that the word " Transforma- 

 tional " expressed the author's meaning better than " Trans- 

 formative " — the word actually used; inasmuch as the 

 latter implied something preparatory or leading up to trans- 

 formation rather than transformation itself. Such transitions 

 have been known for a long time in those Mantidae which 

 are at first ant-like and later on come to resemble leaves, 

 etc. ; also in ant-like and Sawfly-larva-like caterpillars 

 becoming procryptic when older, such as Stauropus fagi and 

 Endromis versicolor, and in caterpillars bearing terrifying 

 eye-spots suggesting a Cobra-like snake, yet developing into 

 well-concealed moths. Such well-known examples lead to 

 the conclusion that the passage from Miiuicry to Protective 

 Resemblance in a single life-history was by no means 

 uncommon, 



H. W. Bates in his classical memoir on Mimicry did not 

 separate these two categories, but, although they had much 

 in common, it was inconvenient to treat them as one. By 

 Mimicry an animal resembled another with Warning Colours, 

 and in resembling it, became conspicuous (in Miillerian 

 Mimicry better known by adopting Warning Colours in common 

 with others in place of an independent advertisement), 

 a^jpearing to be something well known . and disliked by its 

 enemies : by Protective Resemblance an animal became 

 concealed, appearing to be something passed by as of no 

 interest to its enemies. The two categories had been grouped 

 together as " Apatetic Resemblance " (with the substantive 

 form " Apate "), from dTraxT^TiKos deceitful, and defined as 

 follows : — " Colours [including shape and attitude] which 

 cause an animal to resemble some part of its usual environ- 

 ment, or which cause it to be mistaken for an animal of 

 another species." * 



Now that attention had been directed to these interesting 

 examples of passage by a single individual from one category 

 to the other, it was convenient to modify the terminology 

 in order to include them. With the kind help of Prof. 



* " Colours of Animals," Poulton, Internat. Sci. Ser., London, 1890, 

 Table following p. 339. 



