When full-grown, the females lay their eggs.
Where do you suppose they lay their eggs?
Some of them make a hole in the ground.
The end of the abdomen is very strong and sharp, and the locust can make a hole with it quite easily.
When the hole is made, then the eggs are laid in it, and the locust covers the opening to the hole with a sticky substance to keep out the wet.
The eggs usually lie in the ground all winter.
Just think of the locust eggs there are under our feet as we cross the fields!
Millions and millions of little eggs are hidden in the ground.
Early in the next summer the little eggs hatch, and then tiny locusts creep up out of the earth and go hopping about everywhere.