[squeedles]

I do this as well, but put in about an inch of water with a few drops of dish soap. Instant wasp kryptonite. I have a few extension tubes so I can just lean it up against the house and watch as they are sucked in coming in or out.

It is absolutely hypnotizing.

It won't kill an entire nest late in the season, but will knock down their numbers so that they aren't as prevalent.

[tmerc]

You _can_ kill the nest this late in the season with a vacuum. I just did it 2-3 weeks ago; got the queen and all. It took several weeks of vacuum of intermittent vacuuming but you can. I've done this twice using the same method.