An insect trap which includes an enclosure with a removable cover member having at least one opening therethrough and contained within the enclosure is an insect attractant, a take-up roller, a supply roller, each journaled for rotation about parallel, spaced-apart axes, and where a flexible web is wound on the supply roller and transferrable onto the take-up roller. The web has an adhesive on one major surface. Also contained within the enclosure is an electric motor connected in driving relation to the take-up roller and a timer circuit for controlling the ON/OFF state of the electric motor. The timer circuit is designed such that when switched to the “on” state, remains on only long enough to transfer a quantity of the web in a range of plus or minus 10% of the predetermined length dimension between the two rollers before assuming the “off” state.