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Sticker of Locust borer
Bug card No. 0856 of 1,500

Locust borer

Megacyllene robiniae
Name means: “its babies bore tunnels in black locust trees, called Robinia”
Eats: PlantsBeetlesGardens and meadows6 legs

The locust borer is a longhorn beetle with black and yellow stripes, so it looks a lot like a wasp. That disguise helps keep birds away, but it cannot sting. In late summer you can find it on yellow goldenrod flowers.

Lives in
Eastern North America, in fields and meadows near black locust trees
Length
1.1 to 2.8 cm (0.43 to 1.1 in)
Top speed
about 0.42 km/h (0.26 mph)
On foot, estimate
Can it hurt you?
Harmless
Harmless to people. It only looks like a wasp and cannot sting.
What does it eat?
The grown-up beetles eat pollen from goldenrod flowers. The white grubs live inside black locust trees and chew tunnels in the wood.
For real!Photo of Locust borer
Picture by Bruce Marlin. CC BY-SA 2.5, via Wikimedia Commons.

How big is it?

How long is it?

Locust borer about 2.8 cm long (1.1 in)A grain of rice about 6 mm (0.24 in)A toy building brick about 3.2 cm (1.3 in)A crayon about 9 cm (3.5 in)
as long as 5 grains of rice in a rowcould run across a dinner table in 8.6 seconds

How big is Locust borer compared to YOU?

Just maths in your browser. Nothing is saved or sent anywhere.

How fast is it?

cool stuff

Fun facts

1

The third yellow stripe on its back is shaped like a letter W.

2

Mother beetles run up and down tree trunks looking for small cuts in the bark to lay their eggs in.

3

The grubs spend the winter under the bark, then dig tunnels about 10 centimetres long into the tree.

4

The tunnels let in a fungus that rots the inside of the tree, so the tree can break in the wind.

5

The male's feelers are two thirds as long as his body.

you asked

Most asked questions about Locust borer

?Can the locust borer sting?

No. It looks like a wasp, but it is a harmless beetle.

?What does a locust borer eat?

Adults eat goldenrod pollen. The grubs eat wood inside black locust trees.

?How big is a locust borer?

It is about 1 to 3 centimetres long.

For bug experts

Scientific name
Megacyllene robiniae
Group
Beetles
Family
Cerambycidae
Classification
Insecta > Coleoptera > Cerambycidae
Lives on
North America

Where the facts come from

  1. Megacyllene robiniae (Wikipedia, CC BY-SA 4.0): what it looks like, where it lives, what it eats, sizes and fun facts, retold in simple words.
  2. Picture by Bruce Marlin. CC BY-SA 2.5, Wikimedia Commons. The round sticker of this bug is cut from the same picture.

If we got something wrong, sorry, we are bug fans, not a science journal. Tell us at hello@bugwiki.app and we will fix it.

More from the same group: Beetles

Also at home here: Gardens and meadows