help with cocoon ID

[Marty Swanhall]

While doing yard work the other day, I came across a cocoon that was light green in color surrounded by loose silk.  

No idea what it is but took a few pics of it before placing it back to where I found it.

http://www.flickr.com/photos/40352376@N03/sets/72157624311085391/

Marty from Woodbury
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