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Brother Moth
Raphia abrupta - Abrupt Brother Moth (13953929710).jpg
Scientific classification
R. frater
Binomial name
Raphia frater
Grote, 1864
  • Raphia personata (Walker, 1865)
  • Certila flexuosa Walker, 1865
  • Raphia frater var. coloradensis Putnam-Cramer, 1886
  • Raphia pallula H. Edwards, 1886
  • Raphia cinderella Smith, 1903
  • Raphia elbea Smith, 1908
  • Raphia piazzi Hill, 1927

Raphia frater, the Brother Moth, is a moth of the family Noctuidae. It is found from Nova Scotia west, across the forested regions of Canada to British Columbia, south to Mississippi in the east. The southern limits in the west are uncertain due to confusion with several closely related species or forms.

Raphia frater
Geographic distribution and phenotypic variation of Raphia frater subspecies: green – subsp. piazzi; pink – subsp. abrupta; black – subsp. frater; blue – subsp. coloradensis; yellow – subsp. cinderella. Multi-coloured circles indicate transitional populations and/or phenotypically intermediate specimens between respective subspecies. a R. f. piazzi; b R. f. abrupta; c R. f. abrupta; d R. f. abrupta; e R. f. abrupta; f, g R. f. frater; h R. f. abruptafrater intermediate i R. f. abruptafratercoloradensis intermediate from highly variable population in Cherry Co., NE; j R. f. coloradensis; k R. f. coloradensis; l R. f. coloradensis; m R. f. coloradensis; n R. f. cinderella; o, p R. f. coloradensisfrater intermediates; q R. f. elbea; r R. f. elbea; s R. f. elbea. All specimens are males

The wingspan is 33–38 mm. Adults are on wing from May to July depending on the location. There is one generation per year.

The larvae mainly feed on aspen, but have also been recorded from alder, birch, cottonwood and willow.


  • Raphia frater frater (Prairie Provinces, in the east south of the Great Lakes region into Pennsylvania, Ohio and Indiana; In the West, it occurs south along mid-elevation mountain ranges of the Pacific Northwest into Washington, and southward along the Rocky Mountains. Specimens from high elevations in Colorado and New Mexico)
  • Raphia frater abrupta Grote, 1864 (Maryland, Oklahoma and Texas)
  • Raphia frater cinderella Smith, 1903 (central and southern California west of the Sierra Nevada)
  • Raphia frater coloradensis Putnam-Cramer, 1886 (from British Columbia, south in the mountains to at least Colorado and Utah and northeast to southern Alberta)
  • Raphia frater elbea Smith, 1908 (from south-eastern Utah and western New Mexico southward through Arizona into northern Mexico)
  • Raphia frater piazzi Hill, 1927 (central and southern Texas)
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