Evidence for the Theory 
Clytus arietis, the “ wasp-beetle,” as an example 
of this. 
6. It is asserted that mimetic resemblances are 
produced in the most diverse ways; that the 
modes whereby the similarity in appearance is 
brought about are varied, but the result is 
uniform. 
“A lepidopterous insect,” writes Poulton 
(p. 251), ‘requires above all to gain transparent 
wings, and this, in the most striking cases that 
have been studied, is produced by the loose 
attachment of the scales, so that they easily and 
rapidly fall off and leave the wing bare except 
for a marginal line and along the veins (Hemarts, 
Trochifium).” 
7. It is alleged that the imitator and imitated 
are always found in the same locality. If they 
did not do so no advantage would be derived 
from the resemblance. It is further alleged that 
where the mimicking species is edible it is in- 
variably less abundant where it occurs than the 
species it imitates. 
8. It is pointed out that it sometimes happens 
that where in the mimic the sexes differ in 
appearance, the male copies one species, the 
female quite a different one. This is said to be 
because the deception would be liable to be de- 
tected if the mimicking species became common 
relatively to that which is imitated. ‘‘ We there- 
fore find that two or more models are mimicked 
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