What bug comes from a dark brown chrysalis in the ground?

The bug that emerges from a dark brown chrysalis found in the ground is typically the moth known as the "Luna moth" or other similar species. These moths undergo a complete metamorphosis, transforming from caterpillars to pupae in a protective chrysalis before emerging as adult moths. The dark brown color of the chrysalis often helps it blend into the soil, providing camouflage against predators.