Galeopsomyia nebulosa Hansson & Hanson 2023, sp.nov.

Galeopsomyia nebulosa Hansson sp.nov.

(Figs 532, 533, 915, 989, 1087)

Diagnosis (female). Antenna with distinct constrictions between clavomeres (Fig. 1087); genal carina present; mesoscutellum (Fig. 915) with weak reticulation and shiny, meshes elongate, submedian grooves distinct, straight and parallel; dorsellum with median carina; propodeum (Fig. 532) long, with strong reticulation, callus with 11 setae; petiole about 0.5× as long as wide with strong longitudinal carinae; fore wing speculum small (Fig. 533); gaster (Fig. 532) with anterior part narrow for an extended part before smoothly expanding backwards, 2.0× as long as wide, medio-basal Gt1 with longitudinal carinae laterally, tergites with strong reticulation; body black with metallic tinges (Figs 532, 533).

Female holotype: length of body 2.6mm (paratypes 2.4mm).

Scape yellowish-brown with dorsal edge brown, pedicel brown, flagellum dark brown. Head black with golden-green tinges, clypeus dark brown. Mesosoma black with metallic tinges. Legs with fore and hind coxae predominantly black, mid coxa dark brown; trochanters, femora and tibiae yellowish-brown; T1–3 yellowish-brown, T4 brown. Petiole black. Gaster black with metallic tinges; gonoplac black.

Antenna with distinct constriction between C1 and C2. Face below level of toruli with weak reticulation, clypeus smooth, frons with strong reticulation, antennal scrobes with weak reticulation; with genal carina. Vertex with strong reticulation outside ocellar triangle, with wrinkled sculpture inside ocellar triangle; with a carina between posterior ocelli in posterior part.

Mesoscutum with weak reticulation, especially so on midlobe, meshes isodiametric on sidelobes, elongate on midlobe; midlobe with a very weak median groove in posterior half, with eight adnotaular setae in two rows. Mesoscutellum with weak reticulation, meshes elongate; submedian grooves distinct, straight and parallel; with 12 setae scattered over lateral parts. Dorsellum with strong reticulation, with median carina. Propodeum with a strong median carina that expands posteriorly; with strong reticulation; callus with 11 setae. Fore and hind coxae with strong reticulation, mid coxa with weak reticulation. Fore wing with four setae on dorsal surface of submarginal vein; speculum small and closed; costal setal row unbroken.

Petiole about 0.5× as long as wide with strong longitudinal carinae. Gaster ovate-elongate; medio-basal Gt1 with longitudinal carinae laterally; tergites with strong reticulation.

Relative measurements: head length, dorsal view 24; head length, frontal view 42; POL 10.5; OOL 8; lateral ocellus diameter 4.5; head width 56; mouth width 14.5; malar space 17; eye length 23.5; scape length 23; scape width 5; pedicel+flagellum length 65; pedicel length 8; pedicel width, dorsal view 4; F1 length 9; F1 width 5; F2 length 11; F2 width 5; F3 length 10.5; F3 width 5; clava length 23; clava width 6; C3 length 8.5; spicule length 1.5; mesosoma length 83; mesosoma width 55; midlobe of mesoscutum length 29; mesoscutellum length 30; mesoscutellum width 25.5; median part of mesoscutellum width (measured medially) 11; median part of mesoscutellum, width in anterior part11; median part of mesoscutellum, width in posterior part 11; lateral part of mesoscutellum, width (measured medially) 5; dorsellum length 4; propodeum length 16; costal cell length 45; costal cell width (measured at widest part) 3; marginal vein length 38; stigmal vein length 12; gaster length 92; gaster width 46; Gt 2 length (measured medially) 9; Gt 4 length (measured medially) 18.5; Gt 7 length (measured medially) 10; Gt

7 width (measured at base) 19; longest cercal seta length 14; shortest cercal seta length 7.

Male. Length of body 1.7mm.

Antenna (Fig. 989) with scape gradually expanding from base towards plaque, narrowed at apex; plaque dark brown and situated in apical half; dorso-basal whorls of long setae present on F1–F4 and C1. Gaster long ovate. Otherwise as in female.

Relative measurements: head length, dorsal view 17; head length, frontal view 29.5; head width 41; mouth width 11.5; malar space 11; eye length 17; scape length 16; scape width 4.5; plaque length 6; pedicel length 5.5; pedicel+flagellum length 52; F1 length 3.5; F1 width 4; F2 length 5; F2 width 4; F3 length 7.5; F3 width 3.5; F4 length 7.5; F4 width 3; clava length 21; clava width 3.5; mesosoma length 55; mesosoma width 35; gaster length 57; gaster width 25; longest subbasal seta on F1, length 35.

Hosts. Unknown.

Distribution. Costa Rica.

Material examined.

Holotype ♀ COSTA RICA, San José, 19km S 1km W Empalme, Mirador Quetzal, 2600m, iv.2000, P. Hanson (NHMUK). Paratypes (2♀ 1♂, MZLU, MZUCR): 1♀ COSTA RICA, Heredia, 6km ENE Vara Blanca, 10°11’N, 84°07’W, 2000m, ii.2002, INBio, OET, ALAS; following from same locality as previous but collected 10.iii.2002 (1♂), 9.iv.2002 (1♀).