I have to agree with bayuccas suggestion here (which is still a skipper) if you look at the position of the white on the hind wings! it is much nearer the middle on the silver spotted.
hmm. it is possible you're right, though bayucca. here's a few sites that may help
http://wisconsinbutterflies.org/butterfly/species/112-silver-spotted-skipper
and
http://www.butterfliesofmassachusetts.net/hoary-edge.htm
Hesperiidae, Eudaminae, Achalarus lyciades. Very variable guy, but I only know this one with this frosty parts on the hindwing. The usual spots are a little bit smaler compared with tho ones from the link. Please, verify.
http://bugguide.net/node/view/3997/bgimage
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