There are caterpillars in my butterfly garden (Texas Blue Mist plants and Lantana) that I've never seen before. They are black or tan, hairy, yellow stripe down each side, move VERY fast...and eat the flowers of the plants, not the leaves. I can't find them online anywhere, and am very curious as to what they might be. (20 years in this house, and I've never had anything like that in the butterfly garden.) I have a couple of not-very-clear photos, but can't figure out how to attach them. (I live in Arlington, Texas, if that helps.) Thank you!