Any thoughts on this one?

It was fairly large...about 3" across...wings unspread.

Thank you, folks...I couldn't find it in my Butterflies/Moths books.

I looked for you and it is very difficult because there are so many, this is one I think comes close;
http://bugguide.net/index.php?q=search&keys=dolba+hyloeus&search=Search

another one;
http://bugguide.net/node/view/126962

a link to the site;
http://bugguide.net/node/view/15740
on the left had side of the page there is a panel with figures of insects, click on the insect you want to search.
Good luck;
Josephine.

I think that first one was close Josephine.......Rustic Sphinx Moth, Mandusa rustica:

http://images.google.com/imgres?imgurl=http://mothphotographersgroup.msstate.edu/Files/Live/PC/PC7785.jpg&imgrefurl=http://mothphotographersgroup.msstate.edu/Files/Live/Species/7000/7778.shtml&h=225&w=225&sz=19&hl=en&start=12&um=1&tbnid=93Dr9tLJdxi4VM:&tbnh=108&tbnw=108&prev=/images%3Fq%3Drustic%2Bsphinx%2Bmoths%26svnum%3D10%26um%3D1%26hl%3Den

http://mothphotographersgroup.msstate.edu/Files/40/Plate40a.shtml

Try this page.

Thank you!

I knew it was a moth of sorts, but like I said, my book didn't feature it.