He spake, and the locusts came,.... A great army of them, and covered the land, that it was even darkened by them; and were such as had never been seen before, or ever were since; this is the eighth plague, Exo 10:12, with these compare the locusts in Rev 9:3. And caterpillars, and that without number; of these no mention is made in Exodus; they seem to be one of the kinds of locusts, or a different word is here used for the same, and so Kimchi interprets it; some render it the white locust; it has its name from licking up the herbs and grass of the field; as the other name for the locust seems to be taken from its great abundance and increase.