Bk I:601-621 Jupiter transforms Io to a heifer.
Meanwhile Juno looked down into the heart of Argos, surprised that rapid mists had created night in shining daylight. She knew they were not vapours from the river, or breath from the damp earth. She looked around to see where her husband was, knowing by now the intrigues of a spouse so often caught in the act. When she could not find him in the skies, she said, "Either I am wrong, or being wronged," and gliding down from heaven's peak, she stood on earth ordering the clouds to melt. Jupiter had a presage of his wife's arrival and had changed Inachus's daughter into a gleaming heifer. Even in that form she was beautiful. Saturnia approved the animal's looks, though grudgingly, asking, then, whose she was, where from, what herd, as if she did not know. Jupiter, to stop all inquiry, lied, saying she had been born from the earth. Then Saturnia claimed her as a gift. What could he do? Cruel to sacrifice his love, but suspicious not to. Shame urges him to it, Amor urges not. Amor would have conquered Shame, but if he refused so slight a gift as a heifer to the companion of his race and bed, it might appear no heifer!