This was an imprint of a scorpion on a couch at a new clients home, not exactly sure how this happened but here is my 2 cents. The scorpion was either in the attic or the ceiling and fell and then deposited dust onto the furniture. So how do you scorpions get into the attic?
Scorpions and pests crawl in under the stucco where that jtrim attaches to the foundation, they then crawl up the wall into the attic and fall out in any opening that is available. That is how in my opinion how you find them in toilets, bathtubs and showers, because that material makes it impossible for them to climb on. So a home seal is the best protection to keeping them out of your house.