140 



FLASHLIGHTS ON NATURE 



through in its advance to the modern winged 

 condition. In other words, the metamorphosis 

 of the individual sums up for us in brief the 

 evolution of the kind. 



Observe, however, that the young earwigs do 

 not pass through any distinct and well-marked 



stages of larva, 

 pupa, and imago 

 grub, chrys- 

 alis, and butter- 

 fly like their 

 more advanced 

 relations. It is 

 true, the names 

 of larva and 

 pupa are fre- 

 quently given to 

 the two earlier 

 phases in the 

 life of the ear- 

 wig and its 

 allies. But the 

 terms are mis- 



NO. 15. REPLACING THE WINGS BENEATH applied All 



THE WING-CASES. ' 



to the earwig 



is a gradual series of successive moults ; and 

 during one of these moults the wings make their 

 appearance. Moreover, the young earwig when 

 just hatched out of the egg (as you can see 

 in No. 1 8) resembles its mother in everything 

 essential save in the possession of wings. There 



