Abstract: An insect trap is provided that is constructed of a precut sheet of foldable material. The sheet includes vent slots and adhesive layers over selected solid exterior areas. One or more base score lines extend across the mid-portion of the sheet to divide the sheet into first and second side walls. A flap score line extends across the upper sheet width to define a flap section and lateral score lines extend along the longitudinal extent of the sheet inward from the sheet opposing lateral edges, to define end wall parts. The trap is assembled by folding inwardly the end wall parts and rotating together the first and second side walls about the base score lines. The side walls are held together by rotating the flap section about the flap score line and securing it to corresponding upper portions of the adhesive layers.