I have found the following site to be helpful:

http://www.northcountry2000.com/bees%2Cwasps&hornets.htm

Polistes have taken up residence on the eves of one corner of our house. As
per the advice from the above site we've been leaving them alone.
Interesting to watch as they do leave "watchers" on the nest. They will
defend the nest if something gets too close.

Bruce McKenzie
Kenmore, WA USA
mailto:bruce at bmsh.net

-----Original Message-----
Sent: Wednesday, September 17, 2003 14:31
To: tweeters at u.washington.edu
Subject: Wasp nest, and Sparrow traps

Hi all,
I have found a large sphere on the side of my house, that is some kind of
wasp nest. I am wondering who it belongs to, and if I should just leave it,
or are they aggressive in nature. Since I know I am allergic to some
insects, including yellow jackets, it is of some concern.