A new species of the genus Paraxenos Saunders, 1872 (Strepsiptera: Xenidae) from Bembix digger wasps (Hymenoptera: Bembicidae) and a redescription of Paraxenos hungaricus (Székessy, 1955) Author Benda, Daniel 35E5C2BA-2F41-40BD-8C98-D961DFE6E9FD Department of Zoology, Faculty of Science, Charles University, Prague, Czech Republic. & Department of Entomology, National Museum, Prague, Czech Republic. benda.daniel@email.cz Author Pohl, Hans 092A4B3D-879B-4BCE-AD13-784C73494EA3 Institut für Zoologie und Evolutionsforschung, Friedrich-Schiller-Universität, Jena, Germany. hans.pohl@uni-jena.de Author Nakase, Yuta 5AE63E86-8EEB-4AFD-93D9-6DA7696ADE79 Department of Biology, Faculty of Science, Shinshu University, Matsumoto, Japan. yuta.nakase@gmail.com Author Beutel, Rolf BEC0D303-E065-4FEC-B4E8-D388D9566D0B Institut für Zoologie und Evolutionsforschung, Friedrich-Schiller-Universität, Jena, Germany. rolf.beutel@uni-jena.de Author Straka, Jakub 277C95E1-2E50-4D0E-BB39-3950C0895ACF Department of Zoology, Faculty of Science, Charles University, Prague, Czech Republic. jakub.straka@aculeataresearch.com text European Journal of Taxonomy 2023 2023-08-01 885 1 134 155 http://zoobank.org/16930d00-0d5e-4080-9c2f-efade47dc4cd journal article 59550 10.5852/ejt.2023.885.2197 a165ce07-d051-4d17-8f86-8b60886980a2 2118-9773 8205386 16930D00-0D5E-4080-9C2F-EFADE47DC4CD Paraxenos krombeini Kifune & Hirashima, 1987 Fig. 7 Paraxenos krombeini Kifune & Hirashima, 1987: 155 . Diagnosis Female cephalothorax Differing from P . arabicus sp. nov. and P . hungaricus in several characters. Mandible projects beyond anterior edge of head capsule (md, Fig 7A ), versus enclosed in mandibular capsule in P . arabicus and P . hungaricus . Maxilla triangular, similar to that of P . hungaricus , but pointed apically (mx, Fig. 7A ). Maxilla not overlapping or touching mandible. Labial area between maxillae wide (lba, Fig. 7A ). Dorsal labral field distinctly arcuate as in P . arabicus . Clypeal lobe distinctly protruding from head capsule as in P . arabicus versus slightly protruding in P . hungaricus . Fig. 7. Paraxenos krombeini Kifune &Hirashima, 1987 ,holotype, ♀ (KUMC), cephalothorax. A .Anterior part of cephalothorax, ventral side. B . Anterior part of cephalothorax, dorsal side. Abbreviations: lba = labial area; md = mandible; mx = vestige of maxilla. Material examined Holotype SRI LANKA • ♀ on slide; Ratmalana airport; 19–21 Jan. 1975 ; K.V. Krombein , P.B. Karunaratne , P. Fernando and N.V.T.A. Weragoda leg.; host: Bembix orientalis (Handlirsch, 1893) ; KUMC . Description Female cephalothorax (modified from Kifune & Hirashima 1987 ) SHAPE AND COLORATION . Cephalothorax brown, wider than long, trapezoidal; anterior margin of oral portion (clypeal lobe) roundly protruding. Length and maximum width of cephalothorax 1.5–1.6 mm and 1.7–2.0 mm, respectively. Width of abdominal constriction 1.3–1.6 mm . Cephalothoraces of specimens from tristylopized hosts smaller than those from monostylopized hosts. Mandibles almost trapezoidal; each with sharp but short anteriorly directed tooth. Distal part of mandibles projects beyond anterior edge of head capsule. Maxillae triangular, apically pointed or very slightly rounded; not overlapping or touching mandibles. Spiracles dorsally oriented, placed roughly at basal third of cephalothorax. Host Bembix orientalis Handlirsch, 1893 ( Kifune & Hirashima 1987 ). Phylogenetic relationships Unknown. Distribution Sri Lanka .