THE TWO-YEAR CICADA, 



59 



Make a life-history box for the squash bug. 



The squash bug is a representative of the group Hemip- 

 tera (or half -winged insects). 



Other Hemiptera. All the " bugs," properly so called, 

 belong in the order Hemiptera, together with plant lice, 

 bark lice, tree hoppers, cicadas, etc. But two other types 

 will be selected here for study. 



THE TWO-YEAR CICADA OR DOGDAY HARVEST FLY. 



(Cicada tibicen.) 



Haunts. This is the insect commonly but improperly 

 called "locust." It may be found about shade trees in 

 late summer and autumn. Its col- 

 ors are black and green, powdered 

 with white beneath. The adults 

 may be followed by ear to their 

 resting places on the boughs of 

 shade trees, their shrill cries being 

 the most prominent and the best 

 known of the various insect sounds 

 of late summer and of autumn. 

 The nymphs are seldom seen ; but 

 the exuvise which they shed at 

 their last molt are large, and con- 

 spicuous objects of common obser- 

 vation. They are found clinging 

 to weeds, bushes, trees, or fences in early summer. The 

 eggs are laid in slits made in the twigs of trees. When 

 hatched, the young drop to the ground and bury them- 

 selves, and feed upon the juices obtained by puncturing 

 the roots of trees. Two years are required to complete 

 their growth. The second summer following hatching, 



TWO-YEAR CICADA. 



