Throw the main at your load center (breaker box), get up on the roof
with a square of visqueen with duct tape overlapping the edges large
enough to cover the hole,...I hate to say this but pour straight
gasoline down into the hole. The vapors will kill every bee there in a
very short while ('bout 5 min. tops)..remember to cover the hole when
you stop pouring the gasoline as the vapors will not kill all of them on
contact and you will get your ass ate alive if you do not cover it. So,
cover the hole, wait for two hours (this will not only give ample time
to kill any Superman type bees you might have in there it will provide
more than enough time for the gasoline to evaporate). Go up there,
uncover the hole, patch it with something more permanent(clear
electrician's caulk works the best if it's a small hole), then close the
main back (turn the power back on). You're done and so are the bees!