Eriastichus rivalis, Hansson, 2021

Hansson, Christer, 2021, The genus Eriastichus La Salle (Hymenoptera, Eulophidae, Tetrastichinae) in the Neotropical region, introducing 48 new species, ZooKeys 1019, pp. 35-91 : 35

Eriastichus rivalis sp. nov. Figure 47

Type locality.

Costa Rica, San José, 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 José, San Gerardo de Dota, 20-21.ii.2013, J.S. Noyes, NHM (Ent) 2012-91", "HOLOTYPE Eriastichus rivalis Hansson" [red printed label], (NHMUK014431065).

Diagnosis

(male). Head black, scape pale brown, pedicel and flagellum dark brown; ventral plaque on scape ca. 0.4 × as long as scape (Fig. 47 ), antenna with dorsobasal setae on F1 0.5 × as long as F1; gaster with lateral tufts of pale and flattened setae on Gt6.

Description

(male holotype NHMUK014431065). Length of body 2.0 mm. Head black, scape pale brown, pedicel and flagellum dark brown, ventral plaque dark brown. Mesoscutum, mesoscutellum, dorsellum and propodeum black with metallic tinges. Legs with mid and hind coxae dark brown, hind femur pale brown, remaining parts of legs yellowish brown. Gaster dark brown.

Head. Length/width in frontal view 0.8; width/length in dorsal view 2.3; POL/OOL 2.4; WM/MS 1.4; MS/HE 0.6; HE/head length in frontal view 0.6; widths head/mesoscutum 1.2. Antenna. Pedicel + flagellum length/mesoscutum width 2.0; pedicel + flagellum length/head width 1.9; lengths scape/ventral plaque 2.8; ventral plaque located below the middle of scape; scape length/width 3.1; lengths scape/head (dorsal view) 0.6; scape length/HE 1.0; length/width F1, F2, F3, F4, clava: 3.7, 3.2, 3.2, 3.2, 7.3; length dorsobasal setae on F1/length F1 0.5. Mesosoma. Length/width 1.6; mesoscutum length/width 0.6; mesoscutellum length/width 0.7; widths SMG/SLG 1.2; enclosed space between SMG length/width 2,0; lengths mesoscutum/mesoscutellum 1.5; lengths mesoscutellum/dorsellum 2.7; lengths mesosoma/gaster 0.7. Wings. CC length/width 21.3; lengths CC/MV 1.0; lengths MV/ST 2.2; lengths MV/PM 4.1; lengths PM/ST 0.5; submarginal vein with nine setae on dorsal surface. Gaster. With lateral tufts of pale and flattened setae on Gt6.

Figures

Figures 41 - 50. Eriastichus spp. head and antenna in lateral view, male holotypes 41 E. nexilis 42 E. oasis 43 E. ononis 44 E. novalis 45 E. nugalis 46 E. parabilis 47 E. rivalis 48 E. sodalis 49 E. orestis 50 E. pallidops.