258 



NATURAL BISTORT- 



Fig. 205. Female Katydid. 



a sword-like instrument: this is called an ovipositor 

 that is, an instrument for depositing the eggs in their 

 right place. With it the insect pierces holes in the 

 ground in the autumn, placing the eggs there, which are 

 hatched the following year. Some time elapses between 

 the birth of the Katydids and the attainment of their 

 growth, and the full production of their wings, which is 

 necessary to the production of the loud sound with which 

 they greet our ears at night in the latter part of summer. 

 446. The Locusts, one species of which you see repre 

 sented in Fig. 206, have, like the Grasshoppers, the roof- 

 like arrangement of the wing-covers, but they have not 

 that peculiar apparatus for the production of sound which 

 the Grasshoppers have. They have also shorter anten- 

 nse and stouter legs. They are insects of greater power. 

 In some parts of the world they are the most extensive* 



