Key to Nearctic species of Trissolcus Ashmead (Hymenoptera, Scelionidae), natural enemies of native and invasive stink bugs (Hemiptera, Pentatomidae) Author Talamas, Elijah J. https://orcid.org/0000-0002-1048-6345 billy.jenkins@GMAIL.COM Author Johnson, Norman F. https://orcid.org/0000-0003-1691-5187 Author Buffington, Matthew https://orcid.org/0000-0003-1900-3861 text Journal of Hymenoptera Research 2015 2015-03-27 43 45 110 http://dx.doi.org/10.3897/JHR.43.8560 journal article http://dx.doi.org/10.3897/JHR.43.8560 1314-2607-43-45 400C0A045BB046539A87535B5CA22D0C FFAE6E40E208FFC11E681F11E157FFDA 575063 Trissolcus valkyria Johnson & Talamas sp. n. Figures 104-108 Description . Female body length: 0.97-1.11 mm (n=6). Color of radicle: yellow; brown; pale brown. Number of mandibular teeth: three. Number of clypeal setae: 6. Facial striae: absent. Shape of gena in lateral view: receding posteriorly. Genal carina: extending dorsally from base of mandible. Macrosculpture of frons outside of antennal scrobe: absent; irregularly rugose. Orbital furrow: narrow to absent near malar sulcus. Hyperoccipital carina: absent. Preocellar pit: present. Epomial carina: present. Netrion sulcus: complete. Mesoscutal suprahumeral sulcus: indicated by cells. Mesoscutal humeral sulcus: indicated by cells. Pattern of mesoscutal microsculpture: antero-posteriorly uniform. Macrosculpture of mesoscutum: coriacious. Area bounded by axillar crescent: smooth. Parapsidal line: absent. Notaulus: present. Median mesoscutal carina: absent; present. Median mesoscutal sulcus: absent. Sculpture of mesoscutellum: smooth. Postacetabular sulcus: comprised of cells. Shape of episternal foveae: round; antero-posteriorly elongate. Number of episternal foveae: 3-5. Course of episternal foveae ventrally: abutting cells of postacetabular sulcus. Course of episternal foveae dorsally: extending dorsally to mesopleural pit. Sculpture of anterior mesepisternum: smooth or with shallowly impressed microscu lpture . Mesopleural epicoxal sulcus: comprised of cells. Mesopleural carina: complete. Speculum: transversely striate. Paracoxal sulcus in ventral half of metapleuron: absent or indistinguishable from sculpture. Anteroventral extension of metapleuron: short, not reaching mesocoxa. Line of pits along metapleural carina: present. Setation of metapleuron: present. Metapostnotum: invaginated near edge of metascutellum and separating metanoum from propodeum. Color of legs beyond coxae: yellow; femora brown, otherwise variably yellow to brown. Metasomal depression: punctate or crenulate dorsally. Sublateral setae on T1: absent. Setation of laterotergite 1: absent. Sculpture of T2 posterior to antecostal sulcus: smooth or with very faintly impressed striation; distinctly striate posterior to basal costae. Diagnosis. Trissolcus valkyria is most similar to T. thyantae with which it shares a mesoscutellum without microsculpture and a narrow gena. Trissolcus valkyria may be separated T. thyantae and T. occiduus by the presence of a complete and well defined mesopleural carina. From T. occiduus it may also be separated by the narrow gena. Etymology. The epithet "valkyria" is Old Norse for "chooser of the slain" and refers to the female figures in Norse mythology that selected which soldiers would die in battle. The name is to be treated as a noun in apposition. Link to distribution map. [http://hol.osu.edu/map-large.html?id=344497] Material examined. Holotype, female: UNITED STATES: WI, Juneau Co., North Rynearson site, Necedah National Wildlife Refuge, 21.VI-11.VII.1996, flight intercept trap, R. H. Williams, OSUC 542457 (deposited in OSUC). Paratypes : UNITED STATES: 5 females, OSUC 405747, 76433 (OSUC); OSUC 144848-144849, 145646 (USNM). Comments. Trissolcus valkyria , was previously recognized by Johnson but remained undescribed due to a dearth of specimens. A small number of additional specimens are now known, providing in our opinion a sufficient basis for the description of this species.