BTW, at last I realised the difference between your N.American ssp. rubria and ours (Old World's i.e.) nominotypical one. If you look at my picture, you will understand it without of the further ado - just look at the color of the red bands. (taken on 10.10.2008, Russia: Saratov region, near Popovka village)
Unfortunately, this wondrous color is fading with the death of the specimen. Thus in the collection it looks almost the same as yours. So I could not inderstand a difference for so long time!
Alex There is not difference in the color of the band or the overall color between atalanta and rubria. However the color of the band in both ssp varies from specimens. The major difference(s) is that the white subapical band in the upper wing is always wider in ssp atalanta than in rubria. Other difference less evident is that the black spot in the middle of the orange band is smaller in rubria than in atalanta, making this band look like more broken in atalanta. In the reverse of the lower wings the triangular spot in the costa is white in rubria and yellow or cream in atalanta. Jesus