Arabia is the last of inhabited lands towards the south, and it is the only country which produces frankincense, myrrh, cassia, cinnamon, and laudanum. The Arabians do not get any of these, except the myrrh, without trouble. The frankincense they procure by means of the gum styrax, which the Greeks obtain from the Phoenicians; this they burn, and thereby obtain the spice. For the trees which bear the frankincense are guarded by winged serpents, small in size, and of varied colors, whereof vast numbers hang about every tree. They are of the same kind as the serpents that invade Egypt; and there is nothing but the smoke of the styrax which will drive them from the trees. The Arabians say that the whole world would swarm with these serpents, if they were not kept in check in the way in which I know that vipers Such, then, is the way in which the Arabians obtain their frankincense; their manner of collecting the cassia is the following: They cover all their body and their face with the hides of oxen and other skins, leaving only holes for the eyes, and thus protected go in search of the cassia, which grows in a lake of no great depth. All round the shores and in the lake itself there dwell a number of winged animals, much resembling bats, which screech horribly, and are very valiant. These creatures they must keep from their eyes all the while that they gather the cassia.
Now what are these animals?
Locust?