INSECT VARIETY. 229 



here increase rapidly, and the nympha state is soon attained, 

 when their appearance and habits are not materially changed. 

 After living" about a year in this state, they leave the ground 

 during the prevalence of warm weather, and, climbing up the 

 stems of trees in shoals, cast their nympha skin, and then are first 

 heard their incipient chirpings in the woodland glade. 



