Abstract: An improved flea trap (10) capable of arresting very high percentages of available fleas is provided which includes an illumination system (14) which is located in an elevated position and emits a preferred, relatively narrow-band visible spectrum; the source is operated to give an effective variable light intensity, such as by intermittent on-off operation thereof. Preferably, the trap (10) includes an upright frame assembly (12) supporting a central transparent tube (38). A low wattage incandescent light bulb (42) is positioned within tube (38) and serves, with a light filter sheet (54) applied to the interior of tube (38), to emit flea-attracting illumination presenting a spectrum having its maximum peak centered at a wavelength of from about 450-650 nm, and with a maximum peak half-height-width of from about 50-175 nm.