Thank you all for the feedback... as I have had honey bees in my walls before, I do know what the different bees look like. My normal mode is not to interfere and let nature have its way but these guys are very aggressive. I have young grandchildren and their safety is paramount.
I bring all my orchids inside for the winter and I am not offering sanctuary to bugs that sting me when I try and water! I have had chipmunks, mice, snakes, bats, flying squirrels and raccoons INSIDE my house and all have been safely returned to the outside world. Not one has tried to bite or attack me when I was walking by.... I draw the line at self defense...besides, my daughter is a wildlife biologist and I do have to justify my methods to her...
In all fairness, I do realize that they are defending their turf but my orchids come first...so the bees have to go. They have not accepted my offer to flee or move their nest, so they are now on my "list".....
Will keep you all posted! Again, many thanks for all the insight and helpful solutions. Once again this site has proved that collective knowledge is vastly superior....particularly to my own.