Unknown Skipper at NBC, 9/24/13

I found this worn skipper at the National Butterfly Center today.  It's probably something common but I don't see the costal dashes of a Clouded Skipper.  Seems to have a greenish cast but maybe this is a reflection.  Other possibilities are Fawn-spotted Skipper and Olive-clouded Skipper.  Seems funny shaped to me.  Any comments?  My guess is Fawn-spotted because of the pale square.