The genus Eriastichus La Salle (Hymenoptera, Eulophidae, Tetrastichinae) in the Neotropical region, introducing 48 new species Author Hansson, Christer Scientific Associate Biological Museum (Entomology), Lund University, Soelvegatan 37, SE- 22362 Lund, Sweden & Natural History Museum, Life Sciences, Cromwell Road, London, UK christer.hansson@biol.lu.se text ZooKeys 2021 2021-02-22 1019 35 91 http://dx.doi.org/10.3897/zookeys.1019.60364 journal article http://dx.doi.org/10.3897/zookeys.1019.60364 1313-2970-1019-35 EE1BAF875BD74E189DF929E2C9CC7DAC 8D799427736453288CA3E1DB9933AAC6 Eriastichus sodalis sp. nov. Figure 48 Type locality. Costa Rica, San Jose , San Gerardo de Dota, 9°33'N , 83°47'W , 20-21.ii.2013, J.S. Noyes leg. Type specimen. Holotype male dried and glued to a paper card. Original labels: "Costa Rica, San Jose , San Gerardo de Dota, 20-21.ii.2013, J.S. Noyes, NHM (Ent) 2012-91", "HOLOTYPE Eriastichus sodalis Hansson" [red printed label], (NHMUK014431068). Diagnosis (male). Head dark brown with metallic tinges, scape pale brown, pedicel and flagellum dark brown; ventral plaque on scape ca. 0.3 x as long as scape (Fig. 48 ), antenna with dorsobasal setae on F1 0.8 x as long as F1; gaster with lateral tufts of pale and flattened setae on Gt6. Description (male holotype NHMUK014431068). Length of body 1.9 mm. Head dark brown with metallic tinges, scape pale brown, pedicel and flagellum dark brown, ventral plaque dark brown. Mesoscutum and mesoscutellum black with metallic tinges, dorsellum dark brown, propodeum black. Legs with mid coxa and hind femur pale brown, hind coxa dark brown, remaining parts of legs yellowish brown. Gaster dark brown. Head . Length/width in frontal view 0.8; width/length in dorsal view 2.2; POL/OOL 1.6; WM/MS 1.6; MS/HE 0.5; HE/head length in frontal view 0.6; widths head/mesoscutum 1.1. Antenna . Pedicel + flagellum length/mesoscutum width 2.0; pedicel + flagellum length/head width 1.9; lengths scape/ventral plaque 3.0; ventral plaque located in the middle of scape; scape length/width 2.9; lengths scape/head (dorsal view) 0.5; scape length/HE 0.9; length/width F1, F2, F3, F4, clava: 2.9, 2.6, 2.6, 2.4, 5.7; length dorsobasal setae on F1/length F1 0.8. Mesosoma . Length/width 1.7; mesoscutum length/width 0.7; mesoscutellum length/width 0.8; widths SMG/SLG 1.1; enclosed space between SMG length/width 2.2; lengths mesoscutum/mesoscutellum 1.5; lengths mesoscutellum/dorsellum 2.8; lengths mesosoma/gaster 0.7. Wings . CC length/width 19.3; lengths CC/MV 1.0; lengths MV/ST 2.2; lengths MV/PM 5.3; lengths PM/ST 0.4; submarginal vein with six setae on dorsal surface. Gaster . With lateral tufts of pale and flattened setae on Gt6.