Caterpillar ID Needed
This caterpillar has been on my Purple Prairie Clover (Petalostemum purpereum) for the last five days, at least. I have searched for caterpillars of the Southern Dogface, Clouded and Orange Sulphurs for which this plant is said to be a host. None bear the least resemblance. I have searched the web and the closest I can come are a couple of Tussock moths but they are very distant relatives.
I would appreciate your help in identifying this insect.