Several years ago, I posted a picture of a larva to hopefully get an ID on it. I can't remember what plant I found it on, but nobody knew what it was. As I recall, I brought it in to raise, but it died.
This year I've found two of them on P. incarnata/maypops, and I don't want to raise them myself, since the first one died.
They're real small, only about 1/4" long -