Abstract: A structure for repelling flying insects from a selected space is described. The structure includes a cover, extending over the space, a support means to position and support the cover, an insect repellant dispersal means, which in a preferred embodiment includes an air circulation device, positioned beneath the cover, and a source of insect repellant positioned relative to the insect repellant dispersal means. In a preferred embodiment, the source of insect repellant includes citronella, which is introduced in the space in vaporous form, and is dispersed throughout the space by the insect repellant dispersal means.