They're back. Rather than resurrect the old thread which is 2 pages long, here is a link to it for anyone interested.
These are native brown paper wasps. Some are a light brown and about 1.25" long, some are more reddish and only about 1" long.
Brief review, I had some Teenage Mutant Ninja Wasps set up shop in a cavity over my front bay window. When temps got over 90F, they would get very aggressive and attack anyone near the front door of the house. I finally got rid of them there, but they were still nesting in my attic and in the soffit boxes of my dormers. They were up high enough that they didn't bother us any more.
They were tough on the roofers though when I had a new roof put on that fall. I had the roof done in the late fall when the temperatures were cooler so they didn't sting anyone that often, about a half dozen total.
Last Summer I found thousands of them in my attic. When it got cool enough, I went up there and wiped them out with some more of that Spectricide Pro. I got lucky and didn't get stung once. About a month ago I had new siding put on my dormers and gable ends. Its 3/4" PT plywood with 1x4 PT battens 12" OC. The guys pretty much sealed up the attic (except for the vents which are screened) and the soffits. They got this done before the wasps started getting active.
But now they are very active, never seen as many of them, seen them this active this early, or this aggressive in 70F temps. They don't seem to be able to get into the attic or the soffits, but they congregate where they used to have nests. They are getting into the house too, but they seem to be dying as soon as they get in. I think they are chewing on the PT wood. It looks like they are getting in through the windows as thats where I find the bodies.
I'm think that they are also living in the pine trees around my house as I was chased out of my garden twice today. I'm not sure how to get them out of the trees if that is where they are nesting now. The trees are 40 to 60 feet tall, so spraying them doesn't seem to be an option, and I don't want to do mass spraying. Shooting a stream at a nest is OK, but I don't want to kill every insect in the area, most of them are good guys.
I understand these paper wasps are also good guys in that they hunt bugs that eat my garden. If they would stick to just that and stop coming after me, I'd be good with that, but they just don't want to be friends with me.