LEPIDOPTERA. 177 
‘The first section contains those which jly during the day, which 
have club-shaped antenne, and which have their four wings entirely 
free, and standing perpendicularly* when the insect is at rest. 
They are called Butterflies, or Rhopalocera. ‘This section is 
divided into a number of families, which comprise many genera. 
We will content ourselves with calling the attention of the reader 
to some of the most remarkable of these groups, and to those species 
which, either on account of their beauty or abundance, strike, or 
ought to strike, the attention of every one. 
In the family of the Papihonde, we will mention the genera 
Papilio, to which belong the Swallow-tailed Butterfly (Papilio 
machaon), Papilio podahrius, &c., and Parnassius, of which we 
will notice Parnassius Apollo, and Parnassius mnemosyne. 

Fig. 159.—Swallow-tailed Butterfly (Papilio machaon). 
The swallow-tailed butterfly is found plentifully in the fens of 
Cambridgeshire, and Norfolk and Suffolk, and very commonly in 
the environs of Paris. It is seen from the beginning of May till 
towards the middle of June; then from the end of July till Sep- 
tember. It frequents gardens, woods, and, above all, fields of 
lucerne. It is easily taken when settled, particularly at sunset. 
This is one of the largest and the most beautiful of the 
* There are exceptions to this.—Iip. 
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