Siricidae (Hymenoptera: Symphyta: Siricoidea) of the Western Hemisphere
Horntails (Siricidae) are important wood-boring insects with 10 extant genera and about 122 species worldwide. Adults and larvae of Siricidae are often intercepted at ports and are of concern as potential alien invasive species. The family consists of 7 genera and 33 species in the New World: Eriotremex with one species, Sirex with 14 species, Sirotremex with one species, Teredon with one species, Tremex with two species, Urocerus with seven species, and Xeris with seven species. Five of these species have been accidentally introduced from the Old World: Eriotremex formosanus (Matsumura, 1912) into southeastern United States, probably from Vietnam; Sirex noctilio Fabricius, 1793, an important pest of Pinus spp., into eastern North America, Argentina, Brazil, and Uruguay from central Europe; Urocerus gigas (Linnaeus, 1758) into Chile, probably from Europe; Urocerus sah (Mocsáry, 1881) into northeastern North America, probably from southern Europe or North Africa; and Tremex fuscicornis (Fabricius, 1783) into Chile, probably from China.