Rospi.Many of these animals have in their skin glands an allucinogenic substance.The use of this substance, extracted from the Bufo Alvarius, is widely documented in the Americas where the cult of psychedelic rospo/dio was widespread, so as to keep swamps vast areas to allow a normal and constant supply.Children also know that the rospo queue is a very gladly present ingredient in witches and food processors.Even today the rospo is used (not in Italy and in un ritualized contexts) and the central part of this work speaks precisely of this, of how practically it is extracted and the allucinogen of the rospo is used.In addition to this text, the work includes an introduction to cultural aspects related to psychedelic rospo in traditional societies and in the West, a tab on psychoactive agents and a specific bibliography.