I bought a second-hand Skeeter vac a month ago. They are those magic things hooked up to propane that reek of deer breath and does a uv lightshow inside to lure biting insects to their deaths. It's not a zapper but more of a giant mosquito sucking device. The thing works like you wouldn't believe! I emptied it a week ago and I just checked the thing today and it was so full, no more Mosquitos would fit! When I popped the tray open the compacted bug bodies sprang up and went everywhere but the tray was still packed full!
I'm not sure of the range of the thing but I'm pretty sure we're doing all the neighbors a huge favour!