I believe they're most active at night.
Brought this back up,Because I'm gone during the week,Anyway Brad I've been thinking the same thing,That is why I was asking about what time of day they mostly fly.Also HPM was saying about the watermelons & things drawing them.Then I remembered that is where I seen them before.It's hard to imagine that someone hasn't invented a "outside the hive" trap to catch these pests. There may be one available, but I have yet to find it. Looks like they could make a pheremone trap to lure them in. I have yet to have much of a problem but I would like to have no problem with them.