Read Joel 1:4 Using Other Translations
That which the palmerworm hath left hath the locust eaten; and that which the locust hath left hath the cankerworm eaten; and that which the cankerworm hath left hath the caterpiller eaten.
What the cutting locust left, the swarming locust has eaten. What the swarming locust left, the hopping locust has eaten, and what the hopping locust left, the destroying locust has eaten.
After the cutting locusts finished eating the crops, the swarming locusts took what was left! After them came the hopping locusts, and then the stripping locusts, too!