I 



Periodical Cicada 



Tibicen septendecim Linn. 



1 Pupa as it comes from the soil 



2 Pupal shell just cracking 



3 Pupa five minutes later, io:oi 



4 Pupa two minutes later, 10:03 



5 Emerging insect five minutes later, 10:08 



6 Emerging insect three minutes later, io:ii 



