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Longhorn Locust Borer

Megacyllene robiniae


Female, 15 mm in length. Yellow and black stripes. Long antennae.


Eastern North America. Adults found feeding on goldenrod plants as seen here. Female locust borer beetles fly to the trunk of black locust trees and lay eggs in crevices in the bark. These eggs hatch into larvae called locust borers that tunnel beneath the bark of the tree, destroying vascular and structural tissues beneath.


The yellow and black colouration and markings mimics stinging insects and probably helps protect the beetle against predators.

No species ID suggestions

Peters Township, Pennsylvania, USA

Lat: 40.27, Long: -80.05

Spotted on Aug 31, 2015
Submitted on Mar 13, 2019

Spotted for mission

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Locust Borer Locust Borer Locust borer Megacyllene Locust Borer

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