Synonyms and other taxonomic changes
Amphipoea americana (Speyer, 1875)
Hydroecia nicticans var. americana Speyer, 1875
Amphipoea lusca J. B. Smith, 1891
Amphipoea atlantica J. B. Smith, 1899
Identification
forewing bright rusty-orange shaded with orangish-brown; veins, lines, and spots darker brown; reniform spot filled with either white or bright orange
hindwing grayish-brown with orange fringe
Genitalia:
♀
7th sternite in female
A. interoceanica is deeply notched.
♂
digitus extends beyond valvae
Range
coast to coast in northern United States and southern Canada, plus Northwest Territories; south in the west to California, south in the east to Georgia
Season
adults fly from July through September
Food
larvae feed on grasses, sedges, and sometimes roots of corn
See Also
Amphipoea interoceanica is virtually identical but slightly smaller with a stouter body, and the white in the reniform spot is confined to the distal two-thirds