ARTHROPODA 



FIG. 100. End of the ovipositor of a cicada showing below the two saws used to 

 make the insertion for the eggs. Photograph enlarged twenty times. 



FIG. 101. Annual cicada with its beak inserted in 

 a twig. 



forests that a person could not hear his companion 



speak at a distance 



of ten feet. The 



noise is produced by 



the drum present 



only in the male 



beneath the front 



part of the abdo- 

 men. A few days 



later the females 



with the saws of the ovipositor cut slits in the tender 

 branches to deposit numerous eggs which 

 hatched a few days later, and the antlike 

 young descended into the earth to re- 

 main sixteen years feeding on the sap 

 in the roots or absorbing nourishment 

 from the humus in the soil. These 

 insects never sting, as many suppose, 

 and cause but little damage to trees. 



FIG. 102. -Pupa skin The annual cicada (Cicada tibicen), 

 also known as the jar fly or dog-day fly, 



