The locust borer (Megacyllene robiniae) only attacks black locust trees. It’s a native insect and was first found in the eastern part of the United States in natural stands of black locust trees. The locust borer caused problems in colonial times by rendering the durable black locust wood unsuitable for use as fence posts. As settlers moved west in the country, they brought black locust trees… and the borer with them. The borer is now found throughout North America. Despite it’s destructive reputation, I think it’s quite a beautiful insect. It’s as indifferent to human presence as most bees and butterflies when they’re collecting pollen, so it make for great photo ops. You can find them wherever you find goldenrod. In this case it was in my back yard in Rockaway, NJ USA. I used my Nikon D3100 and the 85mm macro lens.