CHAPTER 109

Now with respect to the vipers and the winged snakes of Arabia, if they increased as fast as their nature would allow, impossible were it for man to maintain himself upon the earth. Accordingly it is found that when the male and female come together, at the very moment of impregnation, the female seizes the male by the neck, and having once fastened, cannot be brought to leave go till she has bit the neck entirely through. And so the male perishes; but after a while he is revenged upon the female by means of the young, which, while still unborn, gnaw a passage through the womb, and then through the belly of their mother, and so make their entrance into the world. Contrariwise, other snakes, which are harmless, lay eggs, and hatch a vast number of young. Vipers are found in all parts of the world, but the winged serpents are nowhere seen except in Arabia, where they are all congregated together. This makes them appear so numerous.