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The Pennsylvania State College 
Correspondence Courses in Nature Study 
Jnsect 3Ufe 
LESSON NO. 3 
The Cabbage Butterfly 
By George C. Butz 
W E have studied the house-fly and the honey-bee, and 
while these are both insects , we have found vast 
differences in their structure and habits. We now 
consider another insect which is very different from either 
of the two mentioned. No doubt every child knows what a 
butterfly is, without being able to give a definition or de¬ 
scription that would distinguish it from other insects resem¬ 
bling a butterfly. 
The insects most closely related to the true butterflies, 
and often considered with them, are those known as moths , 
or what the children frequently call “millers.” Let us 
notice the differences between these two classes of insects. 
Butterflies fly by day. They delight in sunshine, and when 
resting they fold their wings together in a vertical position. 
Their antennae, or “feelers,” projecting from the head, are 
thread-like, with a club at the tip. The abdomen is slender. 
On the other hand, the moths fly mostly by night and are 
attracted by lights. When at rest their wings lie horizontally 
or folded closely over the body. The antennae are usually 
feather-like or thread-like, without the club tips, and the 
abdomen is usually large. The wings of butterflies are very 
unlike those of the house-fly or honey-bee. The wings of 
these insects, we may have observed, are clear membranes 
whereas in the case of butterflies they are covered with 
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