CHAPTEE II. 



WHAT IS A PUPA? 



BUT it may now be asked, What is a pupa, and 

 what are the differences between it and a larva, 

 and between it and the perfect insect ? It is very 

 necessary that this should be clearly understood ; 

 and to that end we shall endeavour to render our 

 explanation as simple as possible. But it will be 

 far better than the best description, if the reader 

 will be persuaded to watch these changes through- 

 out himself. The butterfly tribe furnish the very 

 best illustrations in the world ; and by merely 

 collecting a few caterpillars from the way-side, or 

 from the kitchen-garden, a source of amusement 

 will be opened which will a thousand-fold repay 

 the trouble and time consumed in the occupation. 

 Of all other ways, personal observation, when it 

 is so readily to be effected as in the case of these 

 insects, is the best and most impressive method of 

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