We had a yellow jacket colony inside the bricks of our house. There is a small air vent hole in the mortar, and that is where the queen got in. We noticed this a few weeks ago when there where literally hundreds of yellow jackets flying in and out. My solution: I cut out the bottom of a clear, plastic club soda bottle. The very big size. I unscrewed the top, placed a neatly folded paper towel into the bottle and screwed the top back on with a small amount of the towel trapped in the screw top so it did not move. I then sprayed a heavy dose of RAID YELLOW JACKET pesticide onto the paper towel and duct-tape the bottle over the opening of the hole and left it there for two weeks......400 (counted them) dead yellow jackets. They would come out of the hole, fly to the paper towel, touch the pesticide on it and drop! Amazing. No fuss, no problem. I did this at night, around 10:00 pm when there was no activity. They all died in the morning when they came out. I looked through the mess, after and found NO QUEEN however. Not sure what to make of that!!