Josephus[186] unmistakably affirms his belief in the existence of flying serpents, in his account of the stratagem which Moses adopted in attacking the Ethiopians, who had invaded Egypt and penetrated as far as Memphis. From this we may infer that in his time flying serpents were by no means peculiar to Arabia, but, as might have been expected, equally infested the desert lands bordering the fertile strip of the Nile. In Whiston's translation we read that "Moses prevented the enemies, and took and led his army before those enemies were apprised of his attacking them; for he did not march by the river, but by land, where he gave a wonderful demonstration of his sagacity; for when the ground was difficult to be passed over, because of the multitude of serpents (which it produces in vast numbers, and indeed is singular in some of those productions, which other countries do not breed, and yet such as are worse than others in power and mischief, and an unusual fierceness of sight, some of which ascend out of the ground unseen, and also fly in the air, and so come upon men at unawares, and do them a mischief), Moses invented a wonderful stratagem to preserve the army safe and without hurt; for he made baskets, like unto arks, of sedge, and filled them with ibes, and carried them along with them; which animal is the greatest enemy to serpents imaginable, for they fly from them when they come near them; and as they fly they are caught and devoured by them, as if it were done by the harts; but the ibes are tame creatures, and only enemies to the serpentine kind; but about these ibes I say no more at present, since the Greeks themselves are not unacquainted with this sort of bird. As soon, therefore, as Moses was come to the land, which was the breeder of these serpents, he let loose the ibes, and by their means repelled the serpentine kind, and used them for his assistants before the army came upon that ground." These statements of Herodotus and Josephus are both too precise to be explicable on the theory that they refer to the darting or jumping serpents which Nieuhoff describes, in his day, as infesting the palm trees of Arabia and springing from tree to tree; or to the jaculus of Pliny,[187] which darts from the branches of trees, and flies through the air as though it were hurled by an engine, and which is described by Ælian and graphically figured by Lucan[188] in the passage--"Behold! afar, around the trunk of a barren tree, a fierce serpent--Africa calls it the jaculus--wreathes itself, and then darts forth, and through the head and pierced temples of Paulus it takes its flight: nothing does venom there effect, death seizes him through the wound. It was then understood how slowly fly the stones which the sling hurls, how sluggishly whizzes the flight of the Scythian arrow."