Easton's Bible Dictionary (Hebrews 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. Int. Standard Bible Encyclopedia PALMER-WORM pam'-er-wurm (gazam; Septuagint kampe (Amos 4:9 Joel 1:4; Joel 2:25)): "Palmer-worm" means "caterpillar," but the insect meant is probably a kind of locust. See INSECTS; LOCUST.

Multi-Version Concordance Palmer-worm (2 Occurrences) Joel 1:4 That which the palmer-worm hath left hath the locust eaten; and that which the locust hath left hath the canker-worm eaten; and that which the canker-worm hath left hath the caterpillar eaten. (See JPS ASV DBY WBS YLT) Joel 2:25 And I will restore to you the years that the locust hath eaten, the canker-worm, and the caterpillar, and the palmer-worm, my great army which I sent among you. (See JPS ASV DBY WBS YLT)