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- 
“DIPTERA: HYMENOPTERA: 
Vespa Vurcaris. 
Vo... BomByYcans. Bomaus Lapiparius. 
Fic. 114—Two further cases of mimicry; flies resembling a wasp in 
the one and a bee in the other. Drawn from nature: nat. size (A. 
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 
