The ancient Aztec people of Mexico worshiped a vampiric goddess of agriculture named Itzapapalotl (“Obsidian Knife Butterfly”). She could shape-shift into a butterfly and was described as being a beautiful winged woman with jaguar claws on her fingertips and carrying a stone knife in her hand, the symbol of her personification as the ritual knife. Although she was not as bloodthirsty as other gods in her pantheon, she was slain by Mixcoatl with an arrow and her body burned to ash.

Source: Carrasco, Oxford Encyclopedia, 105; Lurker, Dictionary of Gods and Goddesses, 172; Sal, Soldaderas, 2; Vaillant, Aztecs of Mexico, 181