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(invertebrate zoology)
The horntails, a family of the Hymenoptera in the superfamily Siricoidea; females use a stout, hornlike ovipositor to deposit eggs in wood.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.



(horntails), a family of symphytic hymenopterous insects having a cylindrical abdomen. The females have a stout, sometimes very long, ovipositor (hence the common name). Adult horntails do not feed.

Of the approximately 200 species of horntails, 20 are found in the USSR. The insects develop in wood, mainly the wood of coniferous trees. The female pierces the bark with the ovipositor and deposits the eggs, one to three at a time, in a row along the trunk. Spores of wood-destroying fungi, located in a pouch on the female’s abdomen, simultaneously enter the wound in the bark. The cylindrical, white or yellowish larva, which has three pairs of thoracic legs and a spine at the end of the abdomen, gnaws a passage in the wood and feeds on the wood-destroying fungi, which line the passage. Pupation occurs in the wood. The entire developmental cycle lasts one or two years.

All horntails are pests of lumber. Many species attack externally healthy trees, selecting trunks with mechanical injuries. In the USSR the greatest harm is done by Tremex fuscicornis, which infests hardwood, and by Sirex gigas, Paururus juvencus, Paururus ermak, and Xeris spectrum, which are pests of conifers.


The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
The horntail wasp (Tremex columba (L.), Siricidae) has larvae that bore into the trunks of many deciduous trees, and they are eaten in turn by the parasitoid ichneumon wasp (Megarhyssa lunator (Fabr.), Ichneumonidae).
Significant damage may also be caused by some groups of hymenopterans whose larvae develop within the tissues of the tree, such as sawflies (Tenthredinidae) and horntails (Siricidae), or by the chrysomelid larvae of leaf beetles (family Chrysomelidae).
Sensilla on the antennal flagellum of Sirexnoctilio (Hymenoptera: Siricidae).
Test of nonhost angiosperm volatiles and verbenone to protect trap trees for Sirex noctilio (Hymenoptera: Siricidae) from attacks by bark beetles (Coleoptera: Scolytidae) in the northeastern United States.
Descriptions of new genera and species of Tenthredinidae and Siricidae, chiefly from the East Indies, in the collection of the British Museum.
Apidae Apinae Apis Vespidae Vespinae Vespula Diptera Tachinidae Boria Sirphidae Siricidae Neuroptera Chrysopidae Chrysoperla Dermaptera Forficulidae Dorus Orthoptera Tettigonidae Phaneropterinae Microcentrum Order Species Coleoptera curneatus senilis balteata decemlineata actisene varivestis sp.