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About Occasional Invaders
These pests invade your home or place of business infrequently and their intrusion is typically due to a change of weather. They usually wind up indoors while seeking shelter or just happen to wander inside through open doors.
Learn » Psocid


(Family: Order: Psocoptera)

There are over 200 species of psocids (pronounced “sew-sid”) that can be found throughout the United States. Psocids are up to 3/16” in length and appear translucent to off-white in color.


Psocids are frequently referred to as booklice (if indoors) and barklice (when outdoors). However, these common names are misleading by suggesting that psocids might be blood-sucking pests. Psocids are scavengers that feed on decaying organic matter, molds and mildew. They are frequently abundant in humid climates and damp locations. Thus, large populations found in or near the home usually indicate an underlying mold or moisture problem. The presence of psocids is merely a nuisance because the pests do not harm humans or pets and they do not destroy products that are not already compromised.

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