BUTTERFLIES AND MOTHS. 5 
pound eyes are either globular or oval; they are naked or 
covered with short hairs, but in some cases we find long 
and lash-like hairs. 
The antennz or feelers vary greatly in their shape, and 
form a very important organ for classification. They are 
composed of many joints, from 30 to 100; they vary not 
alone in shape and length in the different families, but even 
the sexes of one and the same moth may possess entirely 
different antennz, those of the male being frequently toothed, 
etc., while those of the female are simple. The antenne are 
sense organs, hence highly organized and important for the 
insects, which become disabled if they are removed. The 
illustration (Fig. 8) shows a number of differently formed 
antenne. 
Fig. 8.—Antennz or feelers. Enlarged. 
The Jegs are not always perfect, but in some families of 
lepidoptera they are more or less aborted. In Fig. 9 we 
have both perfect and imperfect examples. Cases occur 
where the legs are entirely absent, at least in the female sex, 
as shown in the Bag-worm described later. 
