The entomological stage of Imago is the final stage of an insect's life cycle. It is the adult stage, where the insect has fully developed wings and is capable of reproduction. This stage is also known as the imaginal stage or imago. During this stage, the insect is most active and is able to fly and mate. The imago stage is the longest stage of an insect's life cycle and is the most important for the species' survival.