HOW TO OI'.SERVE INSECTS. 



33 



as an imago, issues. At first its wings are merely small soft pads, 

 but if it has a free chance to crawl up some vertical surface they 

 will be seen to grow to their full size in a very short time, and 

 after a while to become dry and brittle. The butterfly is now 

 ready to take flight, to seek its mate, and soon after, if a female, 

 to lay its eggs on the cabbages for another generation. 



Figure 35. 



Cabbage butterfiv--larva and imago. 



