Thanks to both of you for your ID and comments. I have one question though. I do agree it is a Field Crescent as I have found it is Butterflies of North America. Does the thickness of the body imply a female...in the above reference the male is much slimmer that the female.

The shape of the abdomen is what makes it possible to recognize this one as a female. The abdomen is sometimes more slender (if she just laid most of her load of eggs for instance), but the shape is still different from the males, and the tip looks pointed. The male abdomen almost always looks slender (sometimes it is fat for a bit right after he emerges from the pupa), and has a blunt tip with a tuft of hair-like scales that often looks divided in the middle. In some groups of butterflies it is much easier than this, in others it is more difficult, but this works pretty well for most species in the subfamily Nymphalinae. If you have one in hand, you can look more closely and see the different structure of the tip of the abdomen on males vs. females.

Also, in some species difference in coloring, pattern, and/or wing shape between males and females. Females average larger than males. In most Nymphalinae the difference is subtle, but there, and with practice most of them can be separated as to gender by appearance. In Phyciodes these differences are there on average, but the pattern can vary so much from one individual to the next that occasional males "look" female, some females "look" male, and some don't look definitely male or female; so, it doesn't always work reliably.