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Superregnum: Eukaryota
Cladus: Unikonta
Cladus: Opisthokonta
Cladus: Holozoa
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Cladus: Protostomia
Cladus: Ecdysozoa
Cladus: Panarthropoda
Phylum: Arthropoda
Subphylum: Hexapoda
Classis: Insecta
Cladus: Dicondylia
Subclassis: Pterygota
Cladus: Metapterygota
Infraclassis: Neoptera
Cladus: Eumetabola
Cladus: Endopterygota
Superordo: Coleopterida
Ordo: Coleoptera
Subordo: Polyphaga
Infraordo: Cucujiformia
Cladus: Phytophaga
Superfamilia: Chrysomeloidea

Familia: Cerambycidae
Subfamilia: Cerambycinae
Tribus: Callidiini
Genus: Hylotrupes
Species: H. bajulus

Hylotrupes Audinet-Serville, 1834

Tavakilian, G. & Chevillotte, H. 2018. 2020. Hylotrupes. In: Roskov Y., Ower G., Orrell T., Nicolson D., Bailly N., Kirk P.M., Bourgoin T., DeWalt R.E., Decock W., Nieukerken E. van, Zarucchi J. & Penev L., eds. 2018. Species 2000 & ITIS Catalogue of Life, 29th November 2018. Digital resource at Species 2000: Naturalis, Leiden, the Netherlands. ISSN 2405-8858. Published online. Accessed: 2020 Jan 30.
Subfamily Cerambycinae: tribe Hylotrupini (atlas of long-horned beetles of Russia)

Hylotrupes is a monotypic genus of woodboring beetles in the family Cerambycidae, the longhorn beetles. The sole species, Hylotrupes bajulus, is known by several common names, including house longhorn beetle, old house borer,[1] and European house borer.[2] In South Africa it also is known as the Italian beetle because of infested packing cases that had come from Italy.[3] Hylotrupes is the only genus in the tribe Hylotrupini


This species, originating in Europe, and having been spread in timber and wood products, now has a practically cosmopolitan distribution, including Southern Africa, Asia, the Americas, Australia, and much of Europe and the Mediterranean.[4][5]
Mounted specimen

Hylotrupes bajulus can reach a body length of about 8–20 mm (0.31–0.79 in), while mature larva can reach 30 mm (1.2 in).[4][5] These beetles are brown to black, appearing grey because of a fine grey furriness on most of the upper surface. On the pronotum two conspicuously hairless tubercles are characteristic of the species. On the elytra usually there are two whitish pubescent spots. Females do not have a real ovipositor, only a little more elongated telson. The species can be defined polymorphic, having an extreme variability, both in the dimensions and in the aspect. In small specimens the pubescent spots on the elytra disappear almost completely and the legs and antennae turn to a reddish color.
Eating sounds of an old-house borer

Adults are most active in the summer (June–September).[4][5] Only the larvae feed on the wood, with a preference for dead wood of pines (Pinus), fir, spruce (Picea abies), Araucaria and Pseudotsuga species .[5][6] Ecologically it can be quite important as a scavenger of dead pine trees, pine fence posts, and similar objects, hastening their decay and collapse.[7] The life cycle from egg to beetle typically takes two to ten years,[4] depending on the type of wood, its age and quality, its moisture content, and also depending on environmental conditions such as temperature. Larvae usually pupate just beneath the wood surface and eclose in mid to late summer. Once the exoskeleton of the newly emerged adult beetle has hardened sufficiently the adults cut oval exit holes 6–10 mm (¼ to 3/8 in) in diameter, typically leaving coarse, powdery frass in the vicinity of the hole.[8]

Hylotrupes bajulus preferentially attacks freshly produced sapwood of softwood timber. Contrary to the name "old-house borer", the species is more often found in new houses; maybe because the beetles are attracted to the higher resin content of wood harvested more recently than 10 years earlier. If old wood is attacked, the damage is usually greater. As the nutrient content of wood decreases with age the larva has to consume larger amounts of wood.[9]

In Australia the infection of home construction is mainly caused by the use of wood already infected with the eggs or larvae of the beetles if the wood is not properly kiln-dried in production.[10][11]


Hylotrupes bajulus. Pest Insects of our Cultural Heritage.
European House Borer. Department of Agriculture and Food, Government of Western Australia.
Smit, Bernard. "Insects in South Africa: How to control them". Oxford University Press 1964
Agriculture Victoria
Skaife, S.H. "African Insect Life" Longmans Green 1953
The Old House Borer, Penn State Department of Entomology web site
Körting, A. (1961). Zur Entwicklung und Schadtätigkeit des Hausbockkäfers (Hylotrupes bajulus L.) In: Dachstühlen verschiedenen Alters. Anzeiger für Schädlingskunde, 34(10), 150-153.
Grimm, M. (2005). Incursion of Hylotrupes bajulus Linnaeus (European House Borer) into Western Australia. The International Research Group on Wood Protection. IRG/WP 05-10558.
Grimm, M., et al. (2009). European House Borer Hylotrupes bajulus Linnaeus in Western Australia: the anatomy of an eradication program. The International Research Group on Wood Protection. IRG/WP 09-20403.

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