AppearanceIt has a wingspan of 33–50 mm. The moth flies from June to August in a single brood in Canada, but in two or more generations in the southern United States, depending on the location.
NamingThere are two recognised subspecies:
⤷ "Panthea furcilla australis" Anweiler, 2009
⤷ "Panthea furcilla furcilla"
The supposed species "P. pallescens" is today considered a form of "P. furcilla" with no taxonomic standing.
FoodThe larvae feed on eastern larch, pines, and spruces.
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