Evidences of Theory of Natural Selection. 329 



protective resemblance, whereby it is shown that a 

 species of one genus, family, or even order, will 

 accurately mimic the appearance of a species be- 

 longing to another genus, family, or order, so as to 

 deceive its natural enemies into mistaking- it for a 

 creature of so totally different a kind. And it must 

 be added that while this fact of mimicry is of ex- 



•DiPTEiy\- 



fiVM^NOPTERfK- 



VoLUceLla inans. 



Vespa Vulgaris. 



&. 



■ii 



Vol , Bomb •/Lfi.rJs. 



Bom BUS LAPiDflRiJs. 



Fig. 174 — Two further cases of mimicry; flies resembling a wasp in 

 the one and a bee in the other. Drawn from nature : nat. size {J?. 

 Coll. Surg. Mus.\. 



traordinarily frequent occurrence, there can be no 

 possibility of our mistaking its purpose. For the fact 

 is never observable except in the case of species which 

 occupy the same area or district. 



Such being what appears to me the only reasonable 

 view of the matter, I will now conclude this chapter 

 on the evidences of natural selection as at all events the 



