Location: S. Illinois
September 20, 2011 5:26 pm
Found this unusual caterpillar on swamp rose mallow. Was about an inch and a half long, and while it had an inchworm like posture, it had 3 pair of prolegs (two pair? how do you count the big clampy ones in the back?). I don’t think that it is pre-pupation coloration, because I found more than one and they were all black/orange/white.
I wasn’t able to identify it with a few searches, so if it is new to science, I would dub it the Halloween Skullapillar.
We haven’t time to research at the moment, but we believe this is a Hooded Owlet Moth Caterpillar in the genus Cucullia, and BugGuide has numerous photos.