Black Belly of the Tarantula (La tarantola dal ventre nero) is a 1971 Italian horror mystery thriller film. It features Giancarlo Giannini, Claudine Auger, Barbara Bouchet, and Rossella Falk.
Inspector Tellini investigates serial crimes where victims are paralysed while having their stomachs ripped open with a knife dipped in venom, much in the same way tarantulas are killed by the black wasp. As suspects keep dying, Tellini directs his attention to a spa all the victims had a connection with.