Context : The name The Death of Procris (Italian: Morte di Procri) has been used since the 19th century, and is supposed to have been inspired by Ovid's tale of the death of Procris at the hands of her husband Cephalus, in Metamorphoses VII. The National Gallery has rejected this title since at least Cecil Gould's catalogue of 1951, since when it has preferred to describe the subject as ``A Mythological Subject'' or ``A Satyr mourning over a Nymph''. 
Answer : Metamorphoses
The The Death of Procris is based upon what?