132 



ZOOLOGY. 



may become the parent of millions of children and grand- 

 children. 



Fio. 155.— Seventeen-year Cicada, a, 6, pupa; c, d, eggs. 



fiG. 153. — Apple Aphis. Natural size and en- 

 larged. 



Fig. 1.54. — Chrysopa and group of stalked eggs. 



Fig. 155.— Case-worm, 

 a, ease. 



Order 9. NcAiroptera. — These are net-veined insects with 

 a complete metamorphosis, the chrysalis residing in a 



