Polia nimbosa (Guenée, 1852)

Varga, Zoltán, Ronkay, Gábor, Nagy, Jenő & Ronkay, László, 2020, Contribution To The Taxonomy And Phylogeny Of The Genus Polia Ochsenheimer, 1816 (Noctuidae, Noctuinae, Hadenini): Species Groups And Pairs In The Holarctic Subgenus Polia S. Str., Acta Zoologica Academiae Scientiarum Hungaricae 66 (1), pp. 35-67 : 56

Polia nimbosa (Guenée, 1852)

Aplecta nimbosa Guenée, 1852 , Histoire Naturelle des Insectes (Lépidoptères) 6: 77. Type locality: “Amerique Septentrionale”.

Taxonomic notes.This species shows nearly the same colour variations as P. nebulosa and it was considered by HEYDEMANN (1944) as subspecies this species despite of the expressed differences in genitalia of both sexes and the reduction of the male brush organ. The most remarkable trend is in this species the rudimentation of the distal section of the left saccular process connected with the reduction of the distal bundle of bristles which also has some geographical variation. The species is widely distributed in the boreal and nemoral forest zones of North America and shows only some clinal variation with the exception of the Vancouver Island population ( P. nimbosa mysticoides Barnes & Benjamin, 1924 ; see: MCCABE 1980).