Hexatricha

{{Short description|Genus of beetles}}

{{Use New Zealand English|date=July 2024}}

{{Use dmy dates|date=August 2019}}

{{Speciesbox

| image = Hexatricha pulverulenta 13466118.jpg

| genus = Hexatricha

| parent_authority = White, 1846

| species = pulverulenta

| authority = (Westwood, 1843)

| synonyms =

Species synonymy

{{Species list

| Hexarthrica pulverulenta | Thomson, 1864

| Lamia pulverulenta | Westwood, 1843

| Lamia (Hexatricha) pulverulenta | White, 1846

}}

| synonyms_ref = {{GBIF |id=1141797 |taxon=Hexatricha pulverulenta |accessdate=16 February 2022}}

}}

Hexatricha pulverulenta, commonly known as the squeaking longhorn, is a beetle in the family Cerambycidae, the only species in the monotypic genus Hexatricha. It is endemic to New Zealand. It was first described by John O. Westwood in 1843 as Lamia pulverulenta,Westwood, J.O. 1843: On the longicorn Coleoptera of New Zealand. Arcana entomologica, 2(14): 25–28, plate LVI. {{doi|10.5962/bhl.title.11771}} [Date of publication: [https://www.biodiversitylibrary.org/page/12171463 'NO. XIV.-1st JULY, 1843']] and later moved into the genus Hexatricha (sometimes incorrectly spelled Hexathrica).{{Cite journal|last1=Bouchard|first1=Patrice|last2=Bousquet|first2=Yves|last3=Davies|first3=Anthony|last4=Alonso-Zarazaga|first4=Miguel|last5=Lawrence|first5=John|last6=Lyal|first6=Christopher|last7=Newton|first7=Alfred|last8=Reid|first8=Chris|last9=Schmitt|first9=Michael|year=2011|title=Family-Group Names In Coleoptera (Insecta)|url=https://zookeys.pensoft.net/articles.php?id=4001|journal=ZooKeys|language=en|issue=88|pages=1–972|doi=10.3897/zookeys.88.807|issn=1313-2970|pmc=3088472|pmid=21594053|doi-access=free}}{{Biolib | 307058 | Hexatricha pulverulenta }}

File:Hexatricha pulverulenta pair on karaka tree.jpg)]]

The squeaking longhorn is so called for the noise it makes, by stridulation, when handled. Female beetles lay an egg under the bark of dead or dying trees, especially Pinus radiata or New Zealand beech (Nothofagus).{{Cite journal|last=Jeffreys|first=F.J.|year=1939|title=Hexatricha pulverulenta Westwood|url=http://www.cerambycoidea.com/titles/jeffreyes1940.pdf|journal=Transactions and Proceedings of the Royal Society of New Zealand|volume=69|pages=347–360}} These hatch in 10–19 days, and larvae live under, and feed off, wood for perhaps two or three years. They pupate for 30 days, hatching from spring to autumn (August to April) into adult beetles which live for up to three months.{{Cite book|title=Which New Zealand Insect?|last=Crowe|first=Andrew|publisher=Penguin|year=2014|isbn=978-0-14-100636-9|location=Auckland|pages=45}} Adults are reluctant fliers.