The present disclosure relates to a barrier against arthropod crawling along a structure. The barrier comprising an outer housing defining a cavity and an access opening. An inner shaft is disposed along a common axis with the outer housing having a mounting member for connecting to an associate structure. An arthropod deterring ingredient is disposed in the cavity for creating an arthropod deterring environment. A baffle cap is slidable along the inner shaft and moveable from and extended position abutting a baffle platform and collapsible to engage the outer housing in a closed position, each position having a snap close fit. Positioning lugs are adapted to fasten the baffle cap in the extended position. The positioning lugs comprise a radial protuberance that is perpendicularly extended from the common axis along the inner shaft.
