This list is based on one compiled by Dr. H. J. Brodie of Winnipeg and published in the Transactions of the Royal Canadian Institute, vol. XVII, part 1, 1929. Since that time the completion of the Hudson Bay Railway to Churchill has opened up territory, which previously had been but slightly worked and has made easily accessible country where the flora and fauna are subarctic. Also a number of new species, subspecies, races, and aberrations have been described from the Province, which seems to make a revised check list advisable. The old list contained 121 names, and that total has now been broucht to about 170.