'Locusts' signify falsities in the extremes, which consume the truths and goods of the church in a person. 'The locusts' which John the Baptist ate signify truths of a most common or general nature.

(References: Apocalypse Revealed 424, 430)

7631. Come unto Pharaoh. That this signifies the presence of truth from the Divine with those who infest, is evident from the signification of “coming” or “entering” to anyone as being presence (see n. 5934, 6003, 6089, 7498); from the representation of Moses, as being truth from the Divine (see n. 6771, 6827); and from the representation of Pharaoh, as being those who in the other life infest those who are of the spiritual church (n. 6651, 6679, 6683, 7107, 7110, 7126, 7142, 7220, 7228).