This last characteristic is stated in the sacred account of the plagues of Egypt, where their faculty of devastation is also mentioned. The corrupting fly and the bruising and prostrating hail preceded them in that series of visitations, but _they_ came to do the work of ruin more thoroughly. For not only the crops and fruits, but the foliage of the forest itself, nay, the small twigs and the bark of the trees are the victims of their curious and energetic rapacity. They have been known even to gnaw the door-posts of the houses. Nor do they execute their task in so slovenly a way, that, as they have succeeded other plagues, so they may have successors themselves. They take pains to spoil what they leave. Like the Harpies, they smear every thing that they touch with a miserable slime, which has the effect of a virus in corroding, or as some say, in scorching and burning. And then, perhaps, as if all this were little, when they can do nothing else, they die; as if out of sheer malevolence to man, for the poisonous elements of their nature are then let loose and dispersed abroad, and create a pestilence; and they manage to destroy many more by their death than in their life. Such are the locusts. And now they are rushing upon a considerable tract of that beautiful region of which we have spoken with such admiration. The swarm to which Juba pointed grew and grew till it became a compact body, as much as a furlong square; yet it was but the vanguard of a series of similar hosts, formed one after another out of the hot mould or sand, rising into the air like clouds, enlarging into a dusky canopy, and then discharged against the fruitful plain. At length the huge innumerous mass was put into motion, and began its career, darkening the face of day. As became an instrument of divine power, it seemed to have no volition of its own; it was set off, it drifted, with the wind, and thus made northwards, straight for Sicca. Thus they advanced, host after host, for a time wafted on the air, and gradually declining to the earth, while fresh broods were carried over the first, and neared the earth, after a longer flight, in their turn. For twelve miles did they extend from front to rear, and their whizzing and hissing could be heard for six miles on every side of them. The bright sun, though hidden by them, illumined their bodies, and was reflected from their quivering wings; and as they heavily fell earthward, they seemed like the innumerable flakes of a yellow-colored snow. And like snow did they descend, a living carpet, or rather pall, upon fields, crops, gardens, copses, groves, orchards, vineyards, olive woods, orangeries, palm plantations, and the deep forests, sparing nothing within their reach, and where there was nothing to devour, lying helpless in drifts, or crawling forward obstinately, as they best might, with the hope of prey. They could spare their hundred thousand soldiers twice or thrice over,