Labena Cresson, 1864

Marinho, Luana S. & Fernandes, Daniell R. R., 2025, Taxonomy of Labena Cresson, 1864 (Hymenoptera: Ichneumonidae: Labeninae) from Brazil, with description of two new species, Zootaxa 5660 (1), pp. 1-52 : 5-6

Labena Cresson, 1864

Labena Cresson, 1864: 339 . Type species: Cryptus grallator Say (subsequent designation, Viereck, 1914: 80).

Caryoecus Walsh, 1866: 30. Type-species: Mesochorus fuscipennis Brullé ( = grallator Say ), by monotypy.

Microtritus Kriechbaumer, 1889: 307 . Type species: Microtitus apicalis Kriechabaumer , by monotypy.

Dyseidopus Kriechbaumer, 1890: 489 . Type-species: Dyseidopus sericeus Kriechbaumer , by monotypy.

Dysidopus Schulz, 1906: 103. Unjustifiable amendment of Dyseidopus Kriechbaumer.

Neonotus Parrott, 1955: 230 . Type species: Neonotus chadwickii Parrott, 1955 (original designation).

Diagnosis. Moderately large to very large insects, fore wing length 5.0–23.0 mm. Mesosoma quite long; mesoscutum from smooth to punctate; propodeum generally with well-defined areas, with an elongated elliptical spiracle, with metasomal insertion far from hind coxae insertions; fore tibia of female inflated, fore tarsus with third tarsomere lobed, the lobe partially extending over fourth tarsomere, and second and third tarsomeres rather short, spinose; fore wing with a large pentagonal areolet; metasoma quite long: tergite I generally fairly evenly broadened posteriorly, with spiracle around or before center; tergite I and sternite I more or less fused laterally; ovipositor projecting beyond the apex of metasoma by 1.3–2.7 times the length of the hind tibia, often more; ovipositor generally laterally compressed, always with lower valve enclosing the upper, the lower usually with fine file-like apical teeth, the upper usually with a row of blunt teeth; male with genital capsule somewhat retracted into metasoma, apically with long pubescence, often in tufts (Gauld 2000).

Distribution. Nearctic region: United States of America and Bermuda; Neotropical region: Mexico, Guatemala, Costa Rica, Panama, Antilles, Colombia, Guyana, French Guiana, Peru, Brazil, Chile, Argentina, and Paraguay. Palearctic region: Granada and Italy. Australian region: Australia ( Say 1835; Brullé 1846; Fabricius 1804; Cresson 1864; Cresson 1874; Kriechbaumer 1890; Szépligeti 1914; Rohwer 1920; Gauld & Holloway 1986; Graf & Marzagão 1999; Gauld 2000; Porter 2005; Khalaim & Ruíz-Cancino 2009, Bordera et al. 2010, Gonzalez-Moreno et al. 2015; Yu et al. 2016; Fernandes et al. 2025).

Biological notes. Labena species are ectoparasitoids of wood-boring Coleoptera belonging to the families Buprestidae , Cerambycidae and Curculionidae ( Yu et al. 2016) . Some species of Labena have already been found parasitizing, Chydarteres striatus ( Fabricius, 1787) , Hedypathes betulinus ( Klug, 1825) , Chion Newman, 1840 , Hephaestion Newman, 1840 , Knulliana Linsley, 1962 Psyrassa Pascoe, 1866 , Saperda Fabricius, 1775 , Stenosphenus Haldeman, 1847 , Uracanthus strigosus Pascoe, 1875 ( Cerambycidae ); Chrysobothris Eschscholtz, 1829 , Dactylozodes Chevrolat, 1829 , Ethon affine Gory & Laporte, 1839 , Thrincopyge LeConte, 1858 ( Buprestidae ) and Lixus Fabricius, 1802 and Pissodes Germar, 1817 ( Curculionidae ) ( Gauld & Holloway 1986; Graf & Marzagão 1999; Gauld 2000).