Here is the gall made by
Dasineura communis Felt, 1911.
Dasyneura communis is a synonym, I believe. Host is
Acer saccharum (Sugar Maple). Damage isn't detrimental, only aesthetic.
I have these every year. Haven't been able to get a picture of the actual adult midge yet.
Here are a couple of websites with more information:
http://ohioline.osu.edu/hyg-fact/2000/2004.html
http://www.dec.ny.gov/docs/lands_forests_pdf/galls.pdf