In the corner of my window where the bees would accumulate the most I put a 
hole through the door the window was in- right by the window.

 I laid a longitudinally bisected piece of ~2'' pvc pipe so that it extended 
over the window about 2 in or so and all the way over the hole I had cut. 
This(half of the) piece of pipe was  trimmed so that it would rest 
conformably on the window and the wood underneath as it extended all the way 
over the hole. I closed the end close to the hole so that bees could only go 
out through the end extending over the window(continuing out the hole in the 
door). I coated the inside with aluminum foil in such a way as to reflect 
light from the outside. On the ouside of the door I stapled a screen funnel 
over the hole.
May have to play with it(isnt that half the fun?)  but mine works well.
In my particular setup the pipe is  oriented horizontally but it probably 
doesnt make much difference

John Horton
N Alabama
 

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