In July, 1952, at Mount Pearl, Newfoundland, larvae were found boring into the trunk of an injured balsam poplar, Populus balsamifera L. In June, 1953, six moths emerged from sections of the injured trunk placed in a cage in an insectary.
Dr. T. N. Freeman (in litt.), Entomology Division, Ottawa, who determined the moth as Pyranthrene tabaniformis Rott. (vespiformis Westwood), stated that this was probably the first record of this European species in North America. This was confirmed by Mr. Kelvin Dorward (in litt.), Economic Insect Survey Section, United States Department of Agriculture, Washington, D.C.