Pest Guides

House Longhorn Beetle

Hylotrupes bajulus


House Longhorn Beetle

  • Adults are 8 to 25mm in length.
  • These wood borer beetles are black or brown and covered with greyish hairs on the upper body and wing cases. There are two shiny black spots on the thorax which resemble eyes
  • The fleshy larvae are greyish white in colour and can grow to 35mm in length when fully developed.


  • The female House Longhorn beetle lays eggs in summer to early autumn in cracks and crevices of wood. They are yellowish to greyish white, elliptical with pointed ends, and hatch in two to three weeks.
  • The larvae of these wood borer beetles do the most damage, as they tunnel in the wood for between three and eleven years.
  • The larvae pupate near the surface of the wood and adults emerge after approximately three weeks.


  • These wood borer beetles infest seasoned or partly seasoned softwoods. They usually damages sapwood but heartwood can also be affected
  • Infestation takes place in isolated instances where infested packing case timbers have been transported.