34 HOW INSECTS ARE CLASSIFIED 
are fitted for sucking. The adults in this group take only liquid 
nourishment, or frequently none at all. The larve, however, are 
provided with well- 
developed jaws, 
adapted for biting 
and chewing. It is 
in the larval stage 
that the represent- 
atives of this order 
are injurious. The 
moth itself, or but- 
terfly, is harmful 
only in the sense 
that it is the parent 
of a succeeding de- 
structive stage. 
The antenne 
are of three general types, and separate the order into its sub- 
groups. Butterflies have slender antenne composed of a large 
number of indistinct rings or segments, with an enlargement or club 
at the end. In the skippers the club at the end of the antenna is 
somewhat elongated, and is turned back at the farther end in a slender 
hook. The antennz of moths are more or less feathered, often elabo- 
Fic. 33.—A butterfly, Argynnis. Original. 
rately so. Butterflies are usu- 
ally on the wing in the day- 
light hours, while moths have 
a tendency to fly at night. 
Butterflies habitually rest with 
their wings folded together ver- 
tically above the body; skip- 
pers may hold the wings in a 
similar position, or may hold 
the front wings vertical and 
the hind wings horizontal; moths habitually rest with their wings 
held horizontal or rooflike, or curved around the abdomen. The 
Fic. 34.— A skipper, Afrytone. Original. 
