A revision of European species of the genus Tetrastichus Haliday (Hymenoptera: Eulophidae) using integrative taxonomy Author Hansson, Christer The Natural History Museum, London, United Kingdom & Biological Museum (Entomology), Lund University, Lund, Sweden christerdennis@gmail.com Author Schmidt, Stefan https://orcid.org/0000-0001-5751-8706 SNSB-Zoologische Staatssammlung Muenchen, Munich, Germany schmidt.s@snsb.de text Biodiversity Data Journal 2020 2020-12-16 8 59177 59177 http://dx.doi.org/10.3897/BDJ.8.e59177 journal article http://dx.doi.org/10.3897/BDJ.8.e59177 1314-2828-8-e59177 AD70B3AB67634D2885F290988225C5C8 2BC7CCC36D765F1C87ACBE8025DFD848 Tetrastichus theoi Graham 1991 Tetrastichus theoi Graham 1991 :254. Holotype ♀ in Naturalis Biodiversity Center, Leiden, The Netherlands, not examined.Fig. 94 Description See Graham (1991) . Male is unknown. Diagnosis Head 2.1 x as long as wide in dorsal view; mesoscutellum with submedian grooves 1.8-2.0 x their distance from sublateral grooves; median part of propodeum, between plicae, smooth or with very weak reticulation. Distribution France ( Graham 1991 ). Ecology Host Unknown. Material examined One ♀ paratype from FRANCE, Agay, on Inula viscosa (NHM).