Abstract: A wall mounted trap for flies and other flying insects includes an open topped cover shell concealing within a light source and a replaceable cartridge of trapping material. The light source is spaced substantially outwardly from the wall surface on which the trap is mounted and is situated adjacent the upper edge of the cover shell for radiating substantial light onto the wall surface directly above the trap. Likewise, a portion of the interior surface of the trap is of a shape and position relative to the light source for concentrating light from the source onto a wall surface immediately adjacent and above the trap. The replaceable cartridge includes a strip of trapping material arranged in a dispensing roll and adapted to be advanced therefrom to a take-up roller for presenting an upwardly facing exposed length of trapping material therebetween. The trapping material is housed within an open topped container for thorough collection of insects and sanitary handling of the used cartridges.