Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada

Species Euxoa adumbrata - Sordid Dart - Hodges#10730

Sordid Dart - Euxoa adumbrata Euxoa adumbrata - Hodges #10730 - Euxoa adumbrata Sordid Dart - Euxoa adumbrata - male
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Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Lepidoptera (Butterflies and Moths)
Superfamily Noctuoidea (Owlet Moths and kin)
Family Noctuidae (Owlet Moths)
Subfamily Noctuinae (Cutworm or Dart Moths)
Tribe Noctuini
Subtribe Agrotina
Genus Euxoa
No Taxon (Subgenus Chorizagrotis)
Species adumbrata (Sordid Dart - Hodges#10730)
Hodges Number
Synonyms and other taxonomic changes
Agrotis adumbrata (Eversmann, 1842)
Agrotis norvegica (Staudinger, 1861)
Agrotis polygonides (Staudinger, 1874)
Agrotis lidia var. inexpectata (Alphéraky, 1897)
Described in 1782 by Stoll, who originally placed it in genus Phalaena.
The nomenclature of adumbrata has gone through a number of changes in recent years; it has been treated as both drewseni (Staud.) and lidia (Stoll) (Hardwick, 1970; Lafontaine, 1987).
[text copied from U. of Alberta site]
wingspan 34-40 mm
The sexes are dimorphic; females are dark blackish-brown and males red-brown. Females are essentially unmarked except for pale scales outlining the reniform and orbicular spots. Males are almost identical to red specimens of Euxoa ochrogaster, and to a lesser degree to Euxoa mimallonis. The male genital characters mentioned below will separate adumbrata from the others. Males of mimallonis also have shining white hindwings, not dirty white or sooty as in adumbrata. The male genital characters can be observed in most specimens without dissection. The Sordid Dart belongs to the Euxoa subgenus Chorizagrotis, characterized by long, apically spatulate saccular extension and short harpes in the male. The only other member of the subgenus in Alberta is E. auxiliaris, which can be separated by its shorter harpes (3 times as long as wide in auxiliaries versus 5 times as long as wide in adumbrata). Females of Chorizagrotis may be separated from females of other Euxoa subgenera by their dorsoventrally flattened abdomen. Keys to the adults of the genus, subgenera and species are provided in Lafontaine, 1987.
[text copied from U. of Alberta site]
Holarctic. In North America adumbrata occurs across northern Canada from Quebec to western Alaska, south to the northern tier of states, and in the mountains to Colorado.
[text copied from U. of Alberta site]
Grasslands, meadows, cultivated areas and other open areas.
[text copied from U. of Alberta site]
adults fly from June to August in Alberta
Life Cycle
Adults are nocturnal and come to light. There is a single brood annually.
[text copied from U. of Alberta site]