When the adult midge has hatched it will either fly away directly or stand on the water for a while. Various factors can prolong the time it takes for the new hatched midge to lift from the surface. Factors like wind, temperature and weather. However, you will also find the adult midge on the surface as the females lay her eggs.
During both these occasions, the fish will feed on the adult midge. And just as with the pupae during a hatch, they often appear in large quantites and often make the fish become selective.
J:son's imitaitons of the adult midge is, as all our dry flies, made with a specially designed foam that makes them almost unsinkable and long lasting.