As soon as the worm has reached the proper size, which is approximately the size of a comma of a medium type script, the little worm bursts open and turns itself inside out. Then the former outer skin reforms, expands and stretches out to become the actual body of the fly, well provided with all the inner digestive organs; the former inside of the worm then brings forth the outer, visible parts of the fly, which, as soon as this transformation has occurred and comes into contact with the outside air, reach their final stage of development within a time frame of five to seven seconds maximum, at which time the fly is fully developed. – The Fly, Chapter 1, Paragraph 17