Re: HOW DO GRASSHOPPERS MOVE?

Grasshoppers can move in three ways- they can walk, jump or (in adults of 
species that have wings) they can fly.  In walking both the two pairs of 
walking legs and the one pair of jumping (hind) legs may be used to propel 
the grasshopper along the surface of the ground or up a plant stem.  
Internal muscles (grasshoppers, like all arthropods, have external 
skeletons, so the muscles are attached internally) move the legs back and 
forth.   In jumping the powerful muscles in the hind legs are used to 
project the grasshopper into the air, sometimes aided by wings which may 
be flapped or act as gliding surfaces in some cases.   Flying grasshoppers 
use strong flight muscles  to flap the wings up and down.  Some (such as 
the migratory plague locusts of Africa and Asia) can travel many miles in 
huge flying swarms.

Reference:

Mound, Laurence.  1990. Insect.   Eyewitness Books.  Alfred A. Knopf, New 
York.