I had a patient with a bee sting--wound up doing a house call to remove his bees which were in a cinderblock wall. He didn't want to kill them, and tried putting a funnel over the crack, which didn't work.
The cinderblock extended about 10 inches above the dirt of his back yard, so I was able to make a tunnel into an old box. I used old drawn comb and some open brood from another hive, and let them get used to the new entrance for a couple of days before inserting the one way trap into the tunnel.
Thanks to Mr. Hogan and others who have posted here about this clever and enjoyable technique.
I'll see if I get the queen next week!