Dark-necked Systena

Systena elongata · Order: Coleoptera · Family: Chrysomelidae

Also called: Elongate Flea Beetle

No source yet on danger. We have no source yet on whether it bites, stings or damages anything.
Dark-necked Systena
Photo: Even Dankowicz, CC BY

The elongate flea beetle is a member of the flea beetle group in the leaf-beetle family. It is found throughout North America.

Source: Wikipedia

How to recognize it

The elongate flea beetle belongs to the flea beetle group in the leaf beetle family.

Source: Wikipedia

Where it lives

It lives across North America.

Source: Wikipedia

Where it comes from

Its natural range is North America.

Source: Wikipedia

Where it is found in the US

Recorded in 30 of 51 states and DC. Most records: South Carolina, Kentucky, Oklahoma, Tennessee, North Carolina, Alabama, Georgia, Arkansas.

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

Source: GBIF

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

Months it is reported in the US

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Source: GBIF

More photos

Dark-necked Systena photo 2
Photo: Robert Webster, CC BY-SA
Dark-necked Systena photo 3
Photo: Robert Webster, CC BY-SA
Dark-necked Systena photo 4
Photo: Raven Dandridge, CC BY
Dark-necked Systena photo 5
Photo: iNaturalist user, CC0

Same family (Chrysomelidae)

Spotted Cucumber BeetleSpotted Cucumber BeetleDiabrotica undecimpunctataDamages trees, gardens or cropsBean WeevilBean WeevilAcanthoscelides obtectusDamages trees, gardens or cropsCowpea WeevilCowpea WeevilCallosobruchus maculatusDamages trees, gardens or cropsSwamp Milkweed Leaf BeetleSwamp Milkweed Leaf BeetleLabidomera clivicollisDamages trees, gardens or cropsAlder Leaf BeetleAlder Leaf BeetleAgelastica alniDamages trees, gardens or cropsDogbane Leaf BeetleDogbane Leaf BeetleChrysochus auratus

Sources

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

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

Text written 2026-10-25 from the sources above and checked sentence by sentence against them. Data fetched 2026-10-25.

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.