Venomous Caterpillars Are Expanding Their Range because of Warming These caterpillars carry a toxic chemical cocktail and Inquisition-like delivery implements—and their geographic range is expanding By Ivan Amato edited by Gary Stix The puss caterpillar is the venomous larval form of the southern flannel moth (Megalopyge opercularis). Its “hairs” conceal highly venomous spines. Assasinations in…