|Painted Lady (Vanessa cardui) - dorsal view|
|Painted Lady (Vanessa cardui) - ventral view|
However, it is very similar to the American Lady (Vanessa virginiensis) I spotted earlier this summer. The keys to telling them apart are the small white spot seen in the upper side (barely visible in my old photo), surrounded by orange, and the two very bold eye spots on the trailing edge of the underside of the the hind wing in the American Lady.
I did spot and identify one other new one today, but I didn't have a camera at hand, and by the time I got mine, it was gone. Maybe later...
and a Pearl Crescent.