68 KATUBE-STUDY LESSONS. 



XIX.-THE CABBAaE-BUTTERFLT. 



The study of this insect may begin with the egg of the butterfly, the 

 larva, the pupa, or witli the butterfly itself. 



Butterflies may be caught and put into an empty hat-box or small barrel 

 with one end knocked out. Put in some cabbage-leaves or leaves of any 

 of the cruciferous family. The butterfly will deposit its eggs on these leaves 

 if fresh. Put also some chips and twigs in the box. Cover the box with 

 cheese-cloth or fly-netting. As soon as the grub appears renew the leaves. 

 Put in fresh leaves from day to day. 



In due time the pupal stage will be reached, the insect will attach itself 

 to a twig or side of the box, and pupate in the form called a chrysalis. If 

 kept in a cool place the butterfly will appear. Watch the different changes 

 closely from day to day. 



A. The Egg. 



1. {a) Make observations in a cabbage-patch ; also 



observe the insects as preserved in the box. 

 (6) Why do so many butterflies visit the cabbage- 

 patch ? 



2. On which side of the leaf does the butterfly deposit 

 its eggs? 



3. (a) Why are the eggs so difficult to find ? 



(d) Infer the advantage of their concealment to the 

 butterfly. 



4. Why do the eggs not fall off" the leaves ? 



5. Are the eggs in clusters, or are they scattered here 

 and there ? 



6. Does this butterfly deposit its eggs on any other 

 kind of plant than the cabbage-plant? 



Examine the leaves of radish, turnip, mignonette, and other vegetables. 



7. (a) Make a drawing of one of the eggs. (Use the 



lens.) 

 (d) Has it a shell ? 

 {c) What color is it ? 

 (d) Is its color any protection to it? 



