The Board of Selectmen at its regular meeting Tuesday unanimously approved a $13,200 contract with a Branford-based ecological management firm to put mosquito larvicide in New Canaan’s storm drains. Representatives from All Habitat Services LLC will come to town to dump a product called Vectolex into some 2,540 catch basins in town, Parks Superintendent John Howe told the board. “They come on scooters, take a scoop of Vectolex, and dump it into each catch basin as they drive around town,” Howe said at the meeting, held in Town Hall. These scooters are installed with GPS so that they can be easily tracked, according to Howe. In addition to mosquito traps installed by the state to monitor pest counts, All Habitat Services will track the mosquitos in town to see if they’re carrying viruses.