Effective over up to an acre of land, this battery-powered garden gadget allows you to commit mass mosquito-cide using a tank of propane. Silent and odorless, the trap emits octenol (something that mozzies find sexy, aspazzarently) to lure the beasties close to the machine. Once there, a vacuum gathers them into the "removable catch basin", or death pan, as I like to call it, where they are dehydrated, giving you the potential to serve mosquito, midge, black-fly and sand-fly biltong at your barbecues. Cost is $500, and the mosquito trap will run for up to three weeks on a 20-pound propane tank. [Hammacher Schlemmer]