Eriastichus derilis, 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 derilis sp. nov. Figure 21

Type locality.

Costa Rica, Cartago, Humo, El Copal, 9°47'N, 83°45'W, 1050-1250 m, 29.ii-6.iii.2008, C. Hansson leg.

Type specimen.

Holotype male dried and glued to a paper card. Original labels: "Costa Rica, Cartago, Humo, El Copal, 9°47'N, 83°45'W, 1050-1250 m, 29.ii-6.iii.2008, C. Hansson", "HOLOTYPE Eriastichus derilis Hansson" [red printed label], (MZLU:7034.1).

Diagnosis

(male). Head with lower ½ yellowish brown and upper ½ dark brown, scape yellowish brown, pedicel and flagellum brown; ventral plaque on scape ca. 0.5 × as long as scape (Fig. 21 ), antenna with dorsobasal setae on F1 0.6 × as long as F1; gaster with lateral tufts of pale and flattened setae on Gt5-6.

Description

(male holotype MZLU:7034.1). Length of body 1.2 mm. Head with lower ½ yellowish brown and upper ½ dark brown, scape yellowish brown, pedicel and flagellum brown, ventral plaque dark brown. Mesoscutum, mesoscutellum, dorsellum and propodeum dark brown. Legs yellowish brown. Gaster dark brown.

Head. Length/width in frontal view 0.8; width/length in dorsal view 2.3; POL/OOL 1.9; WM/MS 1.6; MS/HE 0.5; HE/head length in frontal view 0.6; widths head/mesoscutum 1.2. Antenna. Pedicel + flagellum length/mesoscutum width 1.7; pedicel + flagellum length/head width 1.5; lengths scape/ventral plaque 2.0; ventral plaque located above the middle of scape; scape length/width 3.0; lengths scape/head (dorsal view) 0.5; scape length/HE 0.9; length/width F1, F2, F3, F4, clava: 2.0, 2.0, 2.0, 2.0, 4.3; length dorsobasal setae on F1/length F1 0.6. Mesosoma. Length/width 1.4; mesoscutum length/width 0.6; mesoscutellum length/width 0.9; widths SMG/SLG 1.2; enclosed space between SMG length/width 2.2; lengths mesoscutum/mesoscutellum 1.3; lengths mesoscutellum/dorsellum 4.0; lengths mesosoma/gaster 0.8. Wings. CC length/width 21.0; lengths CC/MV 1.1; lengths MV/ST 1.8; lengths MV/PM 5.0; lengths PM/ST 0.4; submarginal vein with six setae on dorsal surface. Gaster. With lateral tufts of pale and flattened setae on Gt5-6.

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.