Grasshoppers signify the same as locusts: falsity which vastates the extremes of the natural part of the mind.

(Odkazy: Arcana Coelestia 7643)

7670. 'And he drove them out from Pharaoh's face' means that the will of the molesters was totally opposed to God's truth. This is clear from the representation of Moses and Aaron, the ones who were 'driven out', as God's truth, dealt with above in 7677; from the representation of 'Pharaoh' as those who engage in molestation, also dealt with above, in 7637; from the meaning of 'face' as the interiors in respect of the affections there, dealt with in 7666, and so the will, for affections belong to the will but thoughts to the understanding. The total opposition of the will is meant by 'he drove them out from his face'; for anything contrary to the will, that is, to the affections belonging to the will, is driven out.