On August 10, 1943, the Guelph sanitary inspector brought into the Entomological Laboratory at the Ontario Agricultural College an envelope containing six dipterous maggots taken from a baby's mattress. The mother of the infant was very upset, as she had no idea what the “things” crawling out of her baby's mattress were, and was considering taking some action against the furniture company from which she had purchased the mattress only ten days previously.