Palmer-Worm in Easton's Bible Dictionary
(Heb. gazam). The English word may denote either a
caterpillar
(as rendered by the LXX.), which wanders like a palmer
or
pilgrim, or which travels like pilgrims in bands (Joel
1:4;
2:25), the wingless locusts, or the migratory locust
in its
larva state.
Read More about Palmer-Worm in Easton's Bible Dictionary