Found larva on Tamarack (Larix laricina), but it switched to another unrecorded food plant after I captured it. It pupated and when “something” eclosed, I thought it was a parasite, so never considered taking a look at the photo of the larva. Several years later, I took the slide to a meeting of the Wisconsin Entomological Society. The experts thought it was the female Orgyia leucostigma. I did not bring the larval photo, thinking it was NOT a Lepidoptera. Recently, I shared this photo with Bob Patterson of MPG, he questioned the ID and wanted to know if I had a photo of the larva. After searching through my archives, I discovered that this specimen was actually from the larva of O. definita. The eight-year mystery was solved. I have also included the larval and cocoon photo on this website.