A couple months ago, I started work on cutting down the trees in the backyard. They're actually big, overgrown bushes, so it's necessary to get the branches out of the way so I can cut them down at the stump. Due to a lot of different factors, this wasn't something I could get done in one day, or even one week. I was stacking the cut branches under the carport, next to the trashcan. Things got more hectic around here, so the project was left dormant for a few weeks. I asked my son to go out and bundle some of the branches a couple weeks ago while I was working. He started, but soon found out that the branches are now home to a bees nest. They're not actually bees, but I'm not sure what they are. They're larger than sweatbees, and smaller than hornets, and look sort of like a cross between the two. They seem to be rather even-tempered, and only come out if we're really messing with the nest. The only time they seemed more aggressive was when I was taking the trash out Wednesday night. As I was walking back inside, one crawled up inside my shorts and stung me on my upper, outer thigh, which made sitting at my desk all day the next day a real pain. On Saturday, my wife and I went out to get rid of them. I sprayed the pile with the wasp/hornet killer, and let it sit for a bit. She then lifted half the pile with a broomstick while I sprayed some more. This didn't seem to get any reaction from the bees, so I had her lift the pile from the bottom. As soon as she did, I could see the nest structures. As I started spraying, I also saw a swarm of 200-300 bees coming out of the nest. We quickly ran inside. My wife got stung on the ankle, but we were otherwise okay. My plan right now is to go out Wednesday or Thursday morning when it's supposed to be a bit cooler, and flip the pile over on its back, exposing the nest. I can then spray it directly. Prior to this, I will try spraying directly into the main entrance the night before. Any other suggestions on how to handle them?