As with the larva stage of life of the midge, we have found that three colors closely imitate a great majority of all species of midges that trout feed on. Cream, light green and red will cover you in all but some rare, isolated situations. Like the adult and larva flies, detail in the pupae imitations is still very important even though the flies are very small. Trout have plenty of time to examine the emerging pupae while they pick them off with ease. The peacock herl thorax serves several purposes. It provides a glitter effect that looks very similar to the air bubbles that accent the pupae to the surface to hatch. It also imitates the thorax about to split open with wings very well. Segmentation of the abdomen part of the fly is provided by the two different thread weights and types. The trailing shuck completes the imitation.