Pteroxanium kelloggi is a species of bark louse in the Lepidopsocidae family of the order Psocoptera. It can be found in France, Great Britain, Ireland, and Madeira.[1] It is brownish-orange with white spots and is similar to Cerobasis guestfalica.[2]
The species feed on ash, cedar, gorse, ivy, larch, oak, pine, and yew. They also feed on plants such as rhododendrons. They can also be found on decayed fence-posts, foxglove seed-heads, under logs, and leaf litter.[2]