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Eufidonia notataria
As you see on Meadowsweet, in the marshes along the Mousam River near its mouth.
Geometridae, Ennominae, Melanolophiini, Eufidonia notataria.
http://www.butterfliesandmoths.org/speci...
http://bugguide.net/node/view/646400
http://bugguide.net/node/view/20741