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The egg is white, seale-like, and flat. Smaller than the head of 
a pin, it is not easily seen on the fruit until the young grub has 
left it, when it soon after falls or is blown off. 
The larva, or grub, on hatching, is one-sixteenth of an inch in 
length, and, when full grown, ten times as large, or five-eights of 
an inch. It is of a fleshy pink colour, and is covered with a few 
stiff hairs. The male, says A. M. Lea, can be distinguished from 
Apple attacked by the Codlin Moth. 
the female by the presence of a small dark space in the centre of 
the body, that can be seen through the skin. The grub of the light 
brown, or false codlin moth (Cacaecia), is chiefly differentiated by 
its dirty green colour, besides being considerably thinner. 
The pupa, or chrysalis, is brown, and about half an inch in 
length; when empty, it is a very pale brown. 
The cocoon is made of white silk, and is joined to, and more or 
less concealed by, the bark or bandage, wherever it is placed; it is 
never loosely placed, and frequently the grub eats a small hollow 
space for its reception. I have often seen these cocoons between 
the nailed end of the battens, and the end or centre board of fruit 
cases, in places where one could hardly insert the blade of a knife, 
the grub having practically eaten for itself a hollow chamber, where 
it spins its cocoon. . 
Introduction and Distribution. 
The codlin moth is as widely distributed as the apple itself. It 
is a native of Europe, where, owing to the fact that it is there kept 
in check by climatic conditions, or by natural enemies, it is not so 
mischievous as it has proved to be either in America or in Australia. 
