Exodus 10:4

“Else, if thou refuse to let my people go, etc.] He threatens him with the following plague, the plague of the locusts, which Pliny f267 calls “denrum irae pestis”: behold, tomorrow will I bring the locusts into thy coast; according to Bishop Usher f268 this was about the seventh day of the month Abib, that this plague was threatened, and on the morrow, which was the eighth day, it was brought; but Aben Ezra relates it as an opinion of Japhet an Hebrew writer, that there were many days between the plague of the hail, and the plague of the locusts, that there might be time for the grass and plants to spring out of the field; but this seems not necessary, for these locusts only ate of what were…”

“to-morrow will I bring the locusts--Moses was commissioned to renew the request, so often made and denied, with an assurance that an unfavorable answer would be followed on the morrow by an invasion of locusts. This species of insect resembles a large, spotted, red and black, double-winged grasshopper, about three inches or less in length, with the two hind legs working like hinged springs of immense strength and elasticity. Perhaps no more terrible scourge was ever brought on a land than those voracious insects, which fly in such countless numbers as to darken the land which they infest; and on whatever place they alight, they convert it into a waste and barren desert, stripping the ground…”

“The locusts - The locust is less common in Egypt than in many eastern countries, yet it is well known, and dreaded as the most terrible of scourges. They come generally from the western deserts, but sometimes from the east and the southeast. No less than nine names are given to the locust in the Bible, of which the word used here is the most common (ארבה 'arbeh); it signifies “multitudinous,” and whenever it occurs reference is made to its terrible devastations. return to 'Top of Page'”

“10:4 These locusts were not the insects called locusts in North America, but a form of migratory grasshopper. Swarming out of desert regions, they could devastate large areas of land, devouring all the plant life before them.”

“morrow: Exo 8:10, Exo 8:23, Exo 9:5, Exo 9:18, Exo 11:4, Exo 11:5 locusts: The word arbeh, Locust, is derived from ravah, to multiply, be numerous, etc., because they are more prolific than any other insect, and because of the immense swarms of them by which different countries, especially the East, are infested. The locust, in entomology, belongs to a genus of insects known among naturalists by the name of Grylli; which includes three species, crickets, grasshoppers, and locusts. The common great brown locust is about three inches in length; has two antennae about an inch long, and two pair of wings. The head and horns are brown; the mouth and inside of the larger legs bluish; the upper…”

“To punish this obstinate refusal, Jehovah would bring locusts in such dreadful swarms as Egypt had never known before, which would eat up all the plants left by the hail, and even fill the houses. "They will cover the eye of the earth." This expression, which is peculiar to the Pentateuch, and only occurs again in Exo 10:15 and Num 22:5, Num 22:11, is based upon the ancient and truly poetic idea, that the earth, with its covering of plants, looks up to man. To substitute the rendering "surface" for the "eye," is to destroy the real meaning of the figure; "face" is better. It was in the swarms that actually hid the ground that the fearful character of the plague consisted, as the swarms of…”