Abstract: An insect trap utilizing an attractant to attract flies to the device and a poison to kill the flies. The trap has an outer housing open on its upper and lower ends, and a cap which fits onto the upper end of the housing. The cap has a central aperture and a vent tube which extends upwardly. The vent tube is surrounded by a vent screen. A receptacle containing the attractant fits into a receiving member on the underside of the cap, where the only means of exit for the attractant is through the vent tube. A poison sleeve surrounds the receptacle and is coated with the poison. The sleeve rests in a seat formed at the bottom of the receptacle. The receptacle is separable from the cap, and the cap is separable from the housing for replinishment of the attractant or replacement of the poison sleeve. The housing has a bracket for attaching the device to a building. Decoy flies made of yarn may be attached to the outside of the housing.