 Redi was the first to describe ectoparasites in his "Esperienze Intorno alla Generazione degl'Insetti".His notable illustrations in the book are those relevant to ticks, including deer ticks and tiger ticks; it also contains the first depiction of the larva of Cephenemyiinae, the nasal flies of deer, as well as the sheep liver fluke ("Fasciola hepatica").His next treatise in 1684 titled "Osservazioni intorno agli animali viventi che si trovano negli animali viventi" ("Observations on Living Animals, that are in Living Animals") recorded the descriptions and the illustrations of more than 100 parasites.