102 



FIBST LESSONS IN ZOOLOGY. 



The Cicada and its allies, with the Aphidae or plant-lice, 

 have clear fore-wings, but otherwise do not essentially dif- 



Fig. 109.— Chinch-bug. a, b, egg; c, e, larva; /, g, pupa. 



fer from the true bugs. The seventeen-year Cicada (Pig. 

 110) lays its eggs iu holes in oak twigs (Pig. 110, d) by means 



Fig. 110.— 17-year CSoada. c, eggs; a, 6. pupa. 



of a stout saw or ovipositor in the end of its body, while 

 the males alone have under their wings, at the base of the 



