Locust Borer

Megacyllene robiniae

locust_borer_2012.jpg

Locust borer on leaf
The locust borer (Megacyllene robiniae) is a longhorned beetle whose larvae tunnel into the trunks of black locust (Robinia pseudoacacia). Their infestations often kill weakened or damaged black locusts. The colorful black and yellow adults are often seen in late summer as they feed on the pollen of goldenrod and other flowers.
Donna Brunet
Family

Cerambycidae (longhorned beetles) in the order Coleoptera (beetles)

Description

The locust borer is a longhorned beetle whose larvae tunnel into the trunks of black locust (Robinia pseudoacacia). Their infestations often kill weakened or damaged black locusts. The colorful black and yellow adults are often seen in late summer as they feed on the pollen of goldenrod and other flowers. The black and yellow stripes mimic the color pattern of many stinging insects, which affords this harmless insect some protection from predators.