I spent December to April 1937—'38 at St. John, Virgin Island, W. I., and the same period 1938—'9 at Tahiti, French Oceania. The following paper records the species taken, with some notes as to habits and brief descriptions as to the colour pattern of the live insects. This I hope is justified, for too often the original description is of specimens long dead, when the body colour has faded and that of the eyes completely changed.