''Tremex'' is a

genus Genus ( plural genera ) is a taxonomic rank used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In the hierarchy of biological classification, genus com ...

of woodwasp in the Siricidae family. It has 33 species with a holarctic distribution. The larvae feed on hardwoods.Bugguide.net. Genus ''Tremex''
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Selected species

Tremex alchymista ''Tremex alchymista'' is a species of sawfly, native to Hungary and Romania Romania ( ; ro, România ) is a country located at the crossroads of Central, Eastern, and Southeastern Europe. It borders Bulgaria to the south, Ukraine to th ...

'' (Mocsary, 1886)
''

Tremex columba ''Tremex columba'', also known as the pigeon tremex or pigeon horntail, is a species of horntail that is native to eastern and western North America. Appearance and behavior The females are larger than the males, with females growing to 25-3 ...

'' (Linnaeus, 1763)
''

Tremex fuscicornis ''Tremex fuscicornis'' (tremex wasp) is a species of horntail, native to Europe and Asia, and has been introduced to Australia, Canada and Chile Chile, officially the Republic of Chile, is a country in the western part of South America. ...

'' (Fabricius, 1787)
''

Tremex magus ''Tremex magus'' is a species sawfly, native to most of Europe and parts of Russia Russia (, , ), or the Russian Federation, is a transcontinental country spanning Eastern Europe and Northern Asia. It is the largest country in the w ...

'' (Fabricius, 1787)

References

Siricidae {{Sawfly-stub