In a former article in the Canadian Entomologist I mentioned a large capture of the above moth in July, 1876 and '77. At the first I ran out of pins, and so had recourse to the time-honored practice of squeezing—when, lo! out of the hind segments there issued two plumes over an inch long and less than one-sixteenth in diameter, so light that the least breath of air fluttered them from side to side.