Black Arches Moth

Melanchra assimilis · Order: Lepidoptera · Family: Noctuidae

Also called: Black Arches

No source yet on danger. We have no source yet on whether it bites, stings or damages anything.
Black Arches Moth
Photo: Steven Lamonde, CC BY

The black arches moth, Melanchra assimilis, belongs to the cutworm or dart moth group in the Noctuidae family. It lives in North America.

Source: Wikipedia

How to recognize it

Melanchra assimilis is commonly called the black arches and is a noctuid cutworm or dart moth.

Source: Wikipedia

Where it lives

This species is found in North America.

Source: Wikipedia

Where it comes from

Its native range includes North America.

Source: Wikipedia

Where it is found in the US

Recorded in 12 of 51 states and DC. Most records: Michigan, Vermont, Montana, Connecticut, Massachusetts, Minnesota, Maine, New Hampshire.

Darker = more records. Counts are museum and citizen-science records, not population size.

Source: GBIF

Status: native in North America; native in Canada; native in United States. Source: iNaturalist

Months it is reported in the US

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Source: GBIF

More photos

Black Arches Moth photo 2
Photo: Teá Montagna, CC BY
Black Arches Moth photo 3
Photo: Matthew Gerke, CC BY
Black Arches Moth photo 4
Photo: Norma Malinowski, CC BY
Black Arches Moth photo 5
Photo: iNaturalist user, CC0

Questions people ask

Where is the black arches moth found?

It is found in North America.

Source: Wikipedia

Same family (Noctuidae)

Ipsilon Dart MothIpsilon Dart MothAgrotis ipsilonDamages trees, gardens or cropsFall Armyworm MothFall Armyworm MothSpodoptera frugiperdaDamages trees, gardens or cropsArmy Cutworm MothArmy Cutworm MothEuxoa auxiliarisDamages trees, gardens or cropsLarge Yellow UnderwingLarge Yellow UnderwingNoctua pronubaDamages trees, gardens or cropsSilver ΥSilver ΥAutographa gammaAmerican DaggerAmerican DaggerAcronicta americanaCan irritate skin

Sources

  • Wikipedia: https://en.wikipedia.org/wiki/Melanchra_assimilis

Look it up elsewhere: GBIF · iNaturalist · BugGuide · ITIS · Wikipedia

Text written 2026-10-26 from the sources above and checked sentence by sentence against them. Data fetched 2026-10-26.

How this page works

This is one bug's fact sheet. The colored box at the top says whether it is dangerous. Sections below cover how to recognize it, whether it is a pest, and how to deal with it. The US map shows which states have records; tap a state to see other bugs there.

Every fact on Bug FAQ comes from a named source (university extension sites, government agencies, GBIF, iNaturalist, Wikipedia). The source is linked next to each section. If we have no source for something, we leave it out.