These are the cutest caterpillars I have ever seen in my life. In fact, I almost didn't see them. Look at them. They are cameoflaged! Then they attach themselves to the bottom of a leaf and chew away. In fact, they virtually chewed up my tomato plant in two days. If I hadn't had a tomato growing on it which suddenly disappeared from the plant I would not have stopped to examine the plant and the surroundings. I did find the tomato later where it had dropped from the plant and rolled under another plant. Unfortunately, the tomato was no longer edible and it was chewed up as well.
So now to plant another plant. You don't win them all!