The saddleback caterpillar, Acharia stimulea (formerly Sibene stimulea), is the larva of a species of moth native to eastern North America. The species belongs to the family of slug caterpillars, Limacodidae. The larva feeds on a large variety of plants. In Florida and Alabama in the United States, it feeds on ornamental palms such as the Manila palm (Adonidia merrillii). The adult is a dark brown, stout-bodied moth.