Eriastichus diadrys, 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 diadrys sp. nov. Figure 22

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 diadrys Hansson" [red printed label], (NHMUK014431029).

Diagnosis

(male). Head black and antenna dark brown; ventral plaque on scape ca. 0.5 × as long as scape (Fig. 22 ), antenna with dorsobasal setae on F1 0.5 × as long as F1; gaster with lateral tufts of pale and flattened setae on Gt3-6.

Description

(male holotype NHMUK014431029). Length of body 2.1 mm. Head black, antenna dark brown, ventral plaque black. Mesoscutum and mesoscutellum black with metallic tinges, dorsellum and propodeum black. Legs with hind coxa and hind femur dark brown, fore and mid coxae yellowish brown with base dark brown, trochanters, tibiae and tarsi yellowish brown. Gaster dark brown.

Head. Length/width in frontal view 0.7; width/length in dorsal view 2.2; POL/OOL 2.0; WM/MS 1.9; MS/HE 0.5; HE/head length in frontal view 0.6; widths head/mesoscutum 1.1. Antenna. Pedicel + flagellum length/mesoscutum width 1.9; pedicel + flagellum length/head width 1.8; lengths scape/ventral plaque 2.1; ventral plaque located in the middle of scape; scape length/width 2.7; lengths scape/head (dorsal view) 0.5; scape length/HE 0.9; length/width F1, F2, F3, F4, clava: 2.7, 2.9, 2.7, 2.6, 5.7; length dorsobasal setae on F1/length F1 0.5. Mesosoma. Length/width 1.6; mesoscutum length/width 0.7; mesoscutellum length/width 0.8; widths SMG/SLG 1.5; enclosed space between SMG length/width 2.0; lengths mesoscutum/mesoscutellum 1.6; lengths mesoscutellum/dorsellum 2.9; lengths mesosoma/gaster 0.8. Wings. CC length/width 20.6; lengths CC/MV 1.0; lengths MV/ST 2.1; lengths MV/PM 4.8; lengths PM/ST 0.4; submarginal vein with eight setae on dorsal surface. Gaster. With lateral tufts of pale and flattened setae on Gt3-6.

Figures

Figures 18 - 27. Eriastichus spp. head and antenna in lateral view, male holotypes 18 E. decoris 19 E. denotatis 20 E. dotaensis 21 E. derilis 22 E. diadrys 23 E. ebulis 24 E. egrestis 25 E. ellipsis 26 E. drupis 27 E. eleagnis.