Ctesias serra explained

Ctesias serra, commonly known as the cobweb beetle, is a species of beetle native to England in the family Dermestidae.

The common name relates to the habit of the larva of taking trapped insects from spiderwebs.^[1]

The preferred habitat is beneath old thick bark.^[2]

Notes and References

1. Book: Barnard, Peter C. . The Royal Entomological Society Book of British Insects . John Wiley & Sons . 2011. 978-1444344967.
2. Book: Collins, N.M. . The Conservation of Insects and Their Habitats . 180 . Academic Press . 1991 . 0323149308.