The seasonal history of Dryocoetes confusus Sw., in trunks of Abies lasiocarpa (Hook) Nutt., as found under cage conditions at Stanley, B.C., during the two years 1929 and 1930 is summarized in the following statement.

Little appears to have been written about the tiny biting midges known popularly as “punkies”, “no-see-ums” or “sand-flies” which are prevalent in June and July and persist into August, in many wooded sections of Eastern Canada.

In a recent contribution in this Journal, I described a few new Diptera from Canada. The present paper contains descriptions of six new Canadian species and two from the United States, the types of the Canadian species being in the Canadian National Collection. The descriptions of two of the species of Ptiolina in this paper have been prepared by Dr. M. D. Leonard and are included in order that the key to species may be complete. From our study of this genus it seems probable that there are other species to be found, especially in the north where so little collecting has been done.

Apart froni the small size of the insects the main obstacle in determining material in this genus has been the difficulty in identifying the species described by older authors. For some time been have been amassing material in the group and I believe that, with more or less topotypical specimens of every described species before me, I have tied down these names with a reasonable amount of surety.

General ground color yellowish white to semihyaline marked with orange. Vertex with three white spots surrounded by thin orange bands. Pronotum with median U-shaped orange mark of varying thickness usually not touching either margin. Usual triangular spots back of each eye. Scutellum with tip orange, basal angles yellow more or less surrounded by orange. Clavi with well defined anchor-shaped spot in basal half and another spat just before tip.