Metamorphosis of swallow-tailed butterfly: a, 

 larva; b, chrysalis; c, imago, or perfect insect. 



"The change from the caterpillar to the chrysalis and from 

 this to the butterfly is in reality less rapid than might at 

 first sight be supposed. The internal organs all metamor- 

 phose very gradually, and even the sudden and striking 

 change in external form (from the chrysalis to the perfect 

 insect) is very deceptive, consisting merely of a throwing 

 off of the outer skin — the drawing aside, as it were, of a 

 curtain — and the revelation of a form which, far from being 

 new, has been in preparation for days, or even for months." 

 — Sir John Lubbock. 



"The winged butterfly has come such a long distance 

 from its wormlike ancestor that we ordinarily would never 

 connect the two. But if we wish to visualize the far 

 ancestors of the butterflies we have but to look at their 

 caterpillars. What an interesting revelation of evolution 

 at work!" — Vernon Kellogg. 



Why, except as answered by evolution, does a butterfly 

 pass through the stages of a crawling grub and a quiescent 

 chrysalis to the full-fledged "imago," with wings? 



Editor. 



