This is the emergence of the white fly, Ephoron leukon. History of the flyThe name traces back to the classic 19th century white miller wet fly. There was no tail, a white floss body ribbed with silver tinsel, a white throat hackle and white duck wings. As dry-fly fishing gained popularity in the United States during the early 20th century, the white miller naturally evolved into a dry-fly. Whether you call them white flies or white millers, few hatches capture the imagination quite like this one.