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Sericoptera aff. mahometeria
This looks like a Geometrid Moth as well as your green one. They are a big group of moths and can be difficult to identify species as some look very similar to one another. I hope you can find a good reference for Costa Rican Geometrids. I have done a couple of searches online with little luck.
Lat: 9.21, Long: -83.74
Spotted on May 24, 2012 Submitted on May 31, 2012