Punctuation. Question Marks and Commas

This pretty little butterfly was flitting around my garden today. This one is called a Question Mark...for real. There is another one that is almost identical to it called a Comma. The only way to make a good ID is if you can catch a glimpse of a tiny marking on the underside of the hindwing. The first pic, is the butterfly (notice the irregularly shaped edges of the wings). The 2nd shows the Question Mark marking, and the 3rd pic is the Comma's marking.