Longhorn beetle

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{{Taxobox | color = pink | name = Cerambycidae | image = Milkweed3660.JPG | image_width = 250px | image_caption = Milkweed beetle, Tetraopes tetrophthalmus | regnum = Animalia | phylum = Arthropoda | classis = Insecta | ordo = Coleoptera | subordo = Polyphaga | superfamilia = Chrysomeloidea | familia = Cerambycidae | familia_authority = Latreille, 1802 | subdivision_ranks = Subfamilies | subdivision = Aseminae
Cerambycinae
Disteniinae
Laminae
Lepturinae
Necydalinae
Paradrinae
Prioninae
Spondylidinae
etc. }}

The longhorn beetles (Cerambycidae) are a family of beetles notable for their extremely long antennae, which are often as long as or longer than the beetle's body. The family is large, with over 20,000 species described. Several are serious pests, with the larvae boring into wood, where they can cause extensive damage to either living trees or to wood in buildings; the old house borer Hylotrupes bajulus being a particular problem indoors. A number of species mimic ants and wasps, while a majority of species are cryptically colored. The rare giant long-horned beetle (Titanus giganteus) from northeastern South America is the largest (though not the heaviest, and not the longest including legs) insect, with a body length of nearly 17 centimeters.