An insect trap with glue boards which are mounted inside a housing so as to be not readily visible when the trap is seen from various angles. The trap uses a lens with a roughened inside surface in combination with a reflector (preferably double parabolic) to enhance a UV light source mounted inside the trap. The housing of the trap has openings through which insects are able to enter an inside chamber. The walls of the chamber are lined with glue boards, which may be treated with chemical attractant so as to increase the tendency for insects to land on the adhesive area of the glue boards. The trap is designed to appear to be a simple wall sconce, and the angle at which the boards are mounted is such that the trap may be mounted at any orientation or any elevation without any significant likelihood that trapped insects will be seen by persons looking at the trap.