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Callosamia angulifera
The wingspan is 80–110 mm. The larvae feed on Tulip Poplar (Liriodendron tulipifera). Adults do not feed.
It is found from Massachusetts east through central New York, southern Ontario, and southern Michigan to central Illinois, south to the Florida panhandle and Mississippi.
Spotted on exterior wall of local business in Ellijay, GA
For details, compare C. angulifera (http://bugguide.net/node/view/482) with H. cecropia (http://bugguide.net/node/view/4625)