While checking out my bees today, I pulled out the #1 frame in the brood chamber and on the outer side, I saw an unusual insect. This insect looked very much like a honeybee except that it was about 25% larger and had a fairly large, black, somewhat rounded, abdomen. Within a couple of seconds of pulling out the frame, it flew off. It flew more like a housefly than a bee; that is, its legs and abdomen were not noticably hanging down and it seemed to be faster. It was on a cell of nectar/honey; there was not brood on that side. I checked out "Honeybee Pest, Predators and Diseases" but didn't find anything that resembled this thing. Anyone have any suggestions? Geographically, I am located between Baltimore, MD and Washington D.C., USA. Any thoughts? Thanks, David Morris