host plant and matching images in the guide from Minnesota, farther north than me. A state of MN web site indicates they occur there, and they are apparently in OH as well (ohioline.osu.edu/sc193/sc193_5.pdf.

I raised some leaf mining flies to pupaes, but they've not emerged after a month. I'll try raising some of these and see what happens.

I checked out my hollyhock to see if there were still larvae I could raise or adults around. There were at least 4 or 5 adults; I took photos (not great, it was windy) and a specimen. They are indeed Atomacera decepta, Hibiscus sawfly, and this site indicates they do feed on hollyhock.

Very nice! Always good to have adults to confirm the id. I found the following article: Boyd, D. 2005. Beating the hibiscus sawfly. American Nurseryman, February, pp. 22-25. Good pictures in this. He says they " . .also feed on hollyhock (Alcea rosae) and can potentially feed on other members of the mallow family (Malvaceae)." Most all records for hollyhock feeders from the North probably are Atomacera decepta. Neoptilia malvacearum is known only from southern Tex., N.Mex., Az., and Mexico.