Bimaculate Longhorn Beetle

Molorchus bimaculatus · Order: Coleoptera · Family: Cerambycidae

No source yet on danger. We have no source yet on whether it bites, stings or damages anything.
Bimaculate Longhorn Beetle
Photo: Paul Bedell, CC BY-SA

The Bimaculate Longhorn Beetle (Molorchus bimaculatus) is a long-horn beetle in the family Cerambycidae. Its larvae develop inside the wood of hardwood trees and vines such as grapevine, while adults visit flowers of plants like sumac, cherry, apple and dogwood.

Source: Wikipedia

How to recognize it

Molorchus bimaculatus belongs to the long-horn beetle family Cerambycidae.

Source: Wikipedia

What it eats

Adult beetles feed on the flowers of plants including Rhus, Prunus, Malus, Cornus and others.

Source: Wikipedia

Where it is found in the US

Recorded in 40 of 51 states and DC. Most records: Kansas, Virginia, Texas, Pennsylvania, Kentucky, Maryland, Massachusetts, North Carolina.

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

Bimaculate Longhorn Beetle photo 3
Photo: iNaturalist user, CC0
Bimaculate Longhorn Beetle photo 4
Photo: drnancyjackson, CC BY
Bimaculate Longhorn Beetle photo 5
Photo: Reiner Jakubowski, CC BY-SA
Bimaculate Longhorn Beetle photo 6
Photo: Sean Golden, CC BY

Questions people ask

What do the larvae of the Bimaculate Longhorn Beetle eat?

The larvae feed inside the woody parts of hardwood trees and vines such as grapevine.

Source: Wikipedia

Same family (Cerambycidae)

House LonghornHouse LonghornHylotrupes bajulusCan damage your homeAsian Longhorned BeetleAsian Longhorned BeetleAnoplophora glabripennisDamages trees, gardens or cropsRed Milkweed BeetleRed Milkweed BeetleTetraopes tetrophthalmusWhite-spotted SawyerWhite-spotted SawyerMonochamus scutellatusCan damage your homeRed Pine Longhorn BeetleRed Pine Longhorn BeetleStictoleptura rubraSpotted Longhorn BeetleSpotted Longhorn BeetleRutpela maculataDamages trees, gardens or crops

Sources

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

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

Text written 2026-10-24 from the sources above and checked sentence by sentence against them. Data fetched 2026-10-24.

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.