Locust Borer vs Violin Beetle

Side-by-side species comparison

Attribute Locust Borer Violin Beetle
Scientific Name Megacyllene robiniae Mormolyce phyllodes
Order Coleoptera Coleoptera
Family Cerambycidae Carabidae
Size 14-22 mm 80-100 mm
Habitat Farmland Forests
Diet Pollen Feeders Fungus Feeders
Regions Eastern and Central North America Asia
Conservation Least Concern Least Concern

Locust Borer

A striking yellow-and-black wasp mimic that attacks black locust trees in North America. Adults appear in autumn and are commonly found on goldenrod flowers. Larval boring weakens locust trunks and can cause breakage.

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Did You Know?

Adults synchronize their emergence with goldenrod bloom, making autumn fields their primary mating arenas.

Violin Beetle

An extraordinarily flat beetle shaped like a violin. Its paper-thin body allows it to squeeze between bracket fungi and under bark. Found in Southeast Asian rainforests.

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Did You Know?

The violin beetle is so flat it can slide between layers of bracket fungus like a playing card — its body is one of the most extremely flattened of any insect.