Caterpillar
Caterpillars, mentioned in Joel 1:4, signify the evil of the sensual man.
(References: Apocalypse Explained 543; Joel 1)
Great lights
Great lights, as in luminaries, signify love and faith, and are called in Genesis 1:14-17 the sun, moon, and stars.
(References: Arcana Coelestia 31 [1-3])