These stinging caterpillars ate most of the Hibiscus leaves right off the bush

Found these in the garden today and was surprised by the stinging sensation I felt when my arm rubbed against the cluster. Anybody know what they are? They are quite pretty but I must say quite dangerous to the touch. The bush looks pretty sad at the moment, I will cross my fingers all will be well after these caterpillars finish their business. I added a picture of the bloom that usually accompanies the bush, I think she is so pretty.