Like the noise of chariots on the tops of mountains shall they leap, like the noise of a flame of fire that devoureth the stubble, as a strong people set in battle array.
Like the noise of chariots - referring to the loud sound caused by their wings in motion, or else the movement of their hind legs.
On the tops of mountains. Maurer connects this with "they," i:e., the locusts, which first occupy the higher places, and thence descend to the lower places, while they are on the former, which no chariots can reach, shall yet be "like the noise of chariots." It may refer (as in the English version) to "chariots," which make most noise in crossing over rugged heights. But I prefer taking it, "like the noise of chariots, on the tops of mountains shall they (the locusts) leap."