Three faint scallops are visible of a first line near the tornus of the forewing close to the margin. I do not know any Chlenias or Capusa species with that pattern.
Thanks Alison, that helps. I'm back to thinking Chlenias banksiaria. Some specimens have a faint row of spots just inside the termen, and I think I can see the dark patch inside the tornus that is present on most specimens. May is in the right time of year.