42 ARTHROPODS 



Draw inner and outer wings (Xi)- 



Development of Butterfly. — (i) Why is the cabbage 

 butterfly so called? Where are the eggs placed? What 

 does it look like when it is first hatched? The young is 

 called a larva. Does it molt like the grasshopper? Why 

 do you think so? Is the larva injurious? 



(2) Between the larval and the adult stages, the cabbage 

 butterfly passes through a state of complete inactivity. 

 When the larva is through growing, it crawls into a quiet 

 place, assumes a hard brown coat, and is called pupa, and 

 after a short time emerges as a full grown butterfly, imago. 

 Get some specimens of larvae, put them in a box or jar cov- 

 ered in a way that will allow air to enter, feed them on 

 cabbage leaves and notice the stages of development. Note 

 especially how the pupa is suspended from the object to 

 which it is attached. 



(3) In the larva notice the small zveb that comes out 

 under the head. It is spun by the modified labium. Of what 

 use is the web? 



Make drawings of the larva and pupa (X2). 



HABiTg, — Why do butterflies go to flowers? Why do 

 they go to cabbages ? Of what use to them are their color- 

 ings? How do they defend themselves? 



Do butterflies move about on cloudy days? Where do 

 they stay on such days? Where do they stay at night? 



THE MOTH 



Phlcgethontiiis celeus 



I. The Larva. — The larva of the Phlegethontius celeus is 

 the common so-called tomato worm. They may be collected 



