Carpenter Bee Traps

As promised, here is a photo of the carpenter bee traps I use.  They work if your mount them in a place where they do not move (swing in the wind on a hook etc).  It's the only thing I can come up with to cut the bee infestation down.  They 

There is a hole on 3 sides of the wooden box, and the clear container on the side screws to the 4th side.  The bees go into the holes, crawl through tunnels, and then end up into the container.  They can't get out once they get in.  No chemicals involved.