Locust Borer

From a distance they can easily be mistaken for a wasp or bee, even at a closer look they are often mistaken for M. caryae or M. decora. The adult beetle grows between 12 and 20 mm and have a W-shaped 3rd stripe on their elytra. Both sexes antenna are dark brown while male's antenna are two-thirds its body length and the female's are one-half. Their legs are reddish-brown. (http://en.wikipedia.org/wiki/Megacyllene_robiniae)