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Species Idia majoralis - Greater Idia - Hodges#8324

Greater Idia Moth -- Idia majoralis - Idia majoralis Idia majoralis Idia majoralis Greater Idia? - Idia majoralis Brown and tan moth - Idia majoralis Dyspyralis sp. or Something Close To  It? - Idia majoralis Idia majoralis Idia majoralis
Show images of: caterpillars · adults · both
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Lepidoptera (Butterflies and Moths)
Superfamily Noctuoidea (Owlet Moths and kin)
Family Erebidae
Subfamily Herminiinae (Litter Moths)
Genus Idia
Species majoralis (Greater Idia - Hodges#8324)
Hodges Number
Other Common Names
Woodrat Nest Moth (1)
Synonyms and other taxonomic changes
Author: (Smith, 1895)
wingspan 30 - 35mm (1)
Separation from Idia americalis:
The subterminal line (nearer to the costa) of majoralis forms a more squared distad point - like a square protrusion, whereas in americalis it is more a of point, like a small bump.

Also, in americalis, there is a dark patch on the terminal border of the FW just below the apex, that is not present in majoralis.
Massachusetts to Montana south to Mexico (1)
mostly found in woodrat (Neotoma) nests but probably in other habitats too. Woodrats prefer rock outcrops, caves and cliffs but Neotoma floridana also occurs in hardwood forests and swamps and some woodrats occur in deserts (1)
adults fly June through September in most of its range (1)
Life Cycle
larvae live in and pupate inside woodrat nests (1)
See Also
I. americalis averages much smaller with some overlap of smallest I. majoralis and largest I. americalis. Hindwings of I. majoralis are duller and darker than I.americalis with lines less wavy. Forewings are more evenly colored and basal third is not paler, as it is on I. americalis. (1)
Works Cited
1.Rare, Declining, and Poorly Known Butterflies and Moths of Forests and Woodlands in the Eastern United States
Dale F. Schweitzer, Marc C. Minno, David L. Wagner. 2011. U.S. Forest Service, Forest Health Technology Enterprise Team, FHTET-2011-01. .