Taxonomic study of Baeosega and its allies, with description of a new species of Nipponosega (Hymenoptera, Chrysididae, Amiseginae) Author Mita, Toshiharu https://orcid.org/0000-0001-8322-6045 Entomological Laboratory, Faculty of Agriculture, Kyushu University, Motooka 744, Nishi-ku, Fukuoka 819 - 0395, Japan t3mita@agr.kyushu-u.ac.jp text ZooKeys 2021 2021-05-31 1041 1 25 http://dx.doi.org/10.3897/zookeys.1041.66267 journal article http://dx.doi.org/10.3897/zookeys.1041.66267 1313-2970-1041-1 D7AA23EA975C4195927EE76C377FCF48 9086C8941CCE58D5AFED14226CEA4232 Genus Okinawasega Terayama Okinawasega Terayama, 1999: 99. Type species: Okinawasega eguchii Terayama, 1999, original designation. Diagnosis. General characters of Okinawasega are similar to those of Baeosega and Nipponosega ; however, there are some distinctive differences, e.g., the deep malar sulcus in the female, the elongated linear R1 in the male. For more details, see the diagnosis of Baeosega . Description. Female. Clypeal apex not thickened; malar sulcus present (Fig. 10D ); scapal basin shallow, cross-ridged, median longitudinal carina present; occipital carina absent but posterior margin of vertex forming distinct corner behind ocellar triangle; eye setose; flagellum fusiform, intermediate segments broader than long, and with ventral surface flattened. Mesosoma slender, punctate by dense punctures; pronotum with median groove and shallow pit before lateral lobe, as long as combined length of mesoscutum, mesoscutellum and metanotum; mesoscutum with notauli and without parapsides; posterolateral corner of mesoscutum not lobate; micropterous (Fig. 2C ), forewing pads extending to posterior margin of mesoscutellum; mesopleuron with omaulus, without scrobal sulcus; metanotum triangular and small, slightly shorter than mesoscutellum; propodeum with long dorsal surface and a pair of recumbent teeth present, almost meeting together, dorsal posterolateral angles bluntly angulate, lateral and posterior surfaces abruptly declivous. Hind coxa with dorsobasal carina; tarsal claws without inner tooth. Metasoma smooth. Figure 10. Okinawasega eguchii Terayama ♀ A head in frontal view B ditto, dorsal view C ditto, lateral view D ditto, malar space (arrow indicates malar sulcus) E mesosoma. Scale bars: 0.5 mm. Male. Clypeal apex not thickened; scapal basin flat or weakly excavated, cross-ridged; malar sulcus present; occipital carina absent but posterior corner of vertex forming distinct corner behind ocellar triangle, occasionally trace of occipital carina present on upper gena; eye setose; antenna elongate, F3 3.5-4.3 x longer than wide. Mesosoma slender, dorsum punctate by dense punctures; pronotum with median groove and shallow pit before lateral lobe; pronotum as long as mesoscutum, 2/3 of combined length of mesoscutum, mesoscutellum; mesoscutum with notauli; parapsidal line faintly indicated; mesopleuron without omaulus and scrobal sulcus; metanotum approximately half mesoscutellum (Fig. 11E ); a pair of recumbent teeth present, meeting or almost meeting together; propodeum with dorsal posterolateral angles bluntly angulate, posterior surface abruptly declivous; fully winged (Fig. 2D ), pterostigma normal, with linear extension of R1 indicated, long (Fig. 11D , arrow); Rs extended by weakly curved dark streak; medial vein arising before cu-a. Hind coxa with dorsobasal carina; tarsal claws without inner tooth. Metasoma sparsely punctate with smooth interspaces. Figure 11. Okinawasega eguchii Terayama ♂ A head in frontal view B ditto, dorsal view C ditto, lateral view D forewing E mesosoma. Scale bars: 0.5 mm. Distribution. Oriental region: Japan (Yaeyama Islands, southern Ryukyus). Hosts. Unknown. Remarks. The previous record of Baeosega in southern Ryukyus ( Kimsey 1995 ) should probably be attributed to Okinawasega .