Hackberry Emperor

Thanks LuckyLogan, think you're right. I'm not sure how particular wing patterns are to species, but pictures match the celtis better than the leilia. Noticed some differences with the pattern and spots approaching the front of the wing going toward the head.

It would be nearly impossible for this to be Asterocampa leilia. It's host would also need to be present, which it is likely not, seeing that it is a desert species and you are in Northern Missouri.

Thanks James! Wonder how common it is to see these this far north. Reading about adult behaviour listed on the reference page and comparing that to our experience makes me think Tami is a male...