Glockboy,
What a coincidence! There was an article in the local paper today about a couple that had "bees" in their walls. They called a beekeeper to come and get them. He came out and said those are "meat bees" or "yellowjackets", a type of wasp, not bee. They are very aggressive and can cause lots of damage by chewing the wood and drywall. The way I understood the article, honeybees don't make holes, but they will use any cavity they find in trees, walls, etc. You can't just spray bug killer in the hive as the bugs will die and rot and attract more wasps or even ants. This couple paid $1200 for 2 men to come out, cut holes in the interior wall, spray poison, vacuum up the bees and any nest material, and patch the holes. The homeowners just had to do some detail work and paint. Have you caught any of the bugs? The yellowjackets I've seen are smaller, skinnier, more of a bright yellow color than the typical honeybee. I suppose if you looked in the hole you might see honeycomb if they are honeybees or that papery nest stuff if they are wasps/yellowjackets. Be careful and good luck!
Regards,
Kirk