The moth Megalopyge opercularis has numerous common names, incluing southern flannel moth, pussy moth, puss caterpillar, Bolivia bug, and, in Texas, asp. It is visually striking in both larval and adult forms. The inch-long larva is generously coated in long, luxuriant hair-like setae, making it resemble a tiny Persian cat, the characteristic that presumably gave it the name "puss." It is variable in color, from downy grayish-white to golden-brown to dark charcoal gray. It often has a streak of bright orange running longitudinally. The 'fur' on early-stage larvae is sometimes extremely curly, giving the larva a cottony, puffed-up look. The body tapers to a tail that extends well beyond the body, unlike its relative M. crispata (Wagner 2005). The middle instar has a more dishevelled, 'bad-hair-day' appearance, without a distinctive tail.