US Patent 8677678 Flying insect trap with attractant ports

An insect trap (100) includes an entrapment chamber (110) with an entry structure (140) over one open end. The entry structure includes (i) a lid (142) with a central aperture (144) and one or more peripheral apertures (146); (ii) a tapered guide (150) on one side of the lid, and (iii) a port fixture (160) that extends through the central aperture and engages the tapered guide. The port fixture includes one or more tubular ports (168) that extend through the peripheral apertures, and one or more cartridges (170) that are removably inserted into the tubular ports. The cartridges contain attractant that is exposed to the interior of the attractant chamber when the trap is assembled. The cartridges may be replaced to replenish or replace attractant without removing the entry structure.