House longhorn beetle

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House Longhorn Beetle


A dull black or brown beetle, Hylotrupes bajulus, with a thin border of white hairs. The house longhorn beetle larvae eat softwoods such as roof and floor timbers. The adult insects fly from June to August. The larvae grow in length to 15 to 20 mm. The larval stage lasts 3 to 11 years causing serious damage to an infested structure. The house longhorn beetle produces large tunnels and emergence holes with an oval cross section 5 to 7 mm in diameter.

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Sources Checked for Data in Record

  • Hermann Kuhn, Conservation and Restoration of Works of Art and Antiquities, Butterworths, London, 1986
  • G.Caneva, M.P.Nugari, O.Salvadori, Biology in the Conservation of Works of Art, ICCROM, Rome, 1991