In the following list of additions and corrections to my “Annotated Check List of the Macrolepidoptera of Alberta”, published in 1919 by the Alberta Natural History Society, the numbers and names are in accordance with the McDunnough list of 1938, the numbers of the Barnes and McDunnough list of 1917 being given in brackets. Since 1921, seven brief lists of additions and corrections have appeared in the Canadian Entomologist (53: 13-14, 211-212, 55:71-72, 56: 189-191, 60: 117-118, 66: 131-132, 70:260-261).