Asian Longhorned Beetle ID

Update: The Asian longhorned beetle was found in Worcester, Massachusetts in August 2008. If you think you have seen this beetle, please report it here.

With summer almost upon us, insects are entering their active season here in New England. At this time of year, we also start getting more pest reports from concerned citizens across the state. Over the next few weeks, posts here at the MIPOP blog will focus on arming you with the tools you need to spot and identify some of the invasive insect species the state is monitoring for.

One thing that makes insect identification tricky is when there are species that look similar to each other, sometimes fooling even the trained eye. One well-known invader, the Asian longhorned beetle (Anoplophora glabripennis), has a native look-alike that you may encounter in Massachusetts, the whitespotted pine sawyer (Monochamus scutellatus). Upon first glance, it can be easily mistaken for the ALB. However, the whitespotted pine sawyer has a distinctive white spot at the top of where its wing covers ("elytra") meet, while the ALB has none. This comparison of both species shows the location of that white spot on both the male and female whitespotted pine sawyers (click on the image to see it in full size):

Also, note that the white markings on the wing covers and antennae are much more visible on the Asian longhorned beetle. For more information, visit this page from the University of Vermont, and also see our fact sheet.

If you think you've seen an Asian longhorned beetle, or any of the introduced pests, weeds or diseases featured on our website, you can report it and send us a photo here.