Galeopsomyia infusca Hansson sp.nov.

(Figs 426, 427, 803, 976)

Diagnosis (female). Antenna with distinct constriction between C1 and C2 (Fig. 803); genal carina present; mesoscutellum (Fig. 426) with submedian grooves straight and ±parallel, median part with very weak reticulation; dorsellum with median carina; propodeum (Fig. 426) with strong carinae and strong reticulation, callus with two setae; fore coxa pale brown, mid coxa yellow, hind coxa yellow at apex and along anterior part, dark brown along posterior part (Fig. 427); petiole transverse with strong sculpture on dorsal part; gaster (Fig. 426) ovate, 1.5× as long as wide, tergites with strong reticulation, gonoplac short with tip pointed (Fig. 427). Small (1.5mm), predominantly dark brown species (Figs 426, 427).

Female holotype: length of body 1.5mm.

Scape yellowish-brown, pedicel pale brown, flagellum dark brown. Head dark brown with metallic tinges. Mesoscutum and propodeum dark brown; mesoscutellum dark brown with metallic bluish tinges. Legs with fore coxa pale brown, mid coxa yellow, hind coxa yellow at apex and along anterior part, dark brown along posterior part; trochanters, femora, tibiae and tarsi yellow. Petiole black. Gaster dark brown.

Antenna with a distinct constriction between C1 and C2. Frons with strong reticulation, clypeus smooth, antennal scrobes with weak reticulation; with genal carina. Vertex with strong reticulation outside ocellar triangle, with wrinkled sculpture inside ocellar triangle. Occipital margin carinate.

Mesoscutum with strong reticulation, meshes isodiametric on sidelobes, elongate on midlobe; midlobe with a median groove, with six adnotaular setae in one row. Mesoscutellum with weak reticulation, especially so on median part, meshes elongate; submedian grooves distinct, straight and ±parallel; with three setae scattered over lateral parts. Dorsellum with weak sculpture, with median carina. Propodeum with a wide median carina that expands in posterior part; with strong irregular carinae and strong reticulation; callus with two 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 closed; costal setal row unbroken.

Petiole transverse with strong sculpture on dorsal part. Gaster ovate; tergites with strong reticulation; gonoplac short with tip pointed.

Relative measurements: head length, dorsal view 17; head length, frontal view 32; POL 7.5; OOL 5.5; lateral ocellus diameter 3.5; head width 41; mouth width 11.5; malar space 19.5; eye length 19; scape length 14; scape width 3.5; pedicel+flagellum length 47; pedicel length 5.5; pedicel width, dorsal view 3.5; F1 length 7; F1 width 4.5; F2 length 6.5; F2 width 4; F3 length 6.5; F3 width 4; clava length 17; clava width 5; C3 length 6; spicule length 2; mesosoma length 49; mesosoma width 36; midlobe of mesoscutum length 17; mesoscutellum length 19; mesoscutellum width 18; median part of mesoscutellum width (measured medially) 8; median part of mesoscutellum, width in anterior part 7; median part of mesoscutellum, width in posterior part 8; lateral part of mesoscutellum, width (measured medially) 2.5; dorsellum length 3.5; propodeum length 8.5; costal cell length 25; costal cell width (measured at widest part) 2; marginal vein length 24; stigmal vein length 9; gaster length 51; gaster width 35; Gt 2 length (measured medially) 7; Gt 4 length (measured medially) 13; Gt 7 length (measured medially) 2.5; Gt

7 width (measured at base) 13; longest cercal seta length 10; shortest cercal seta length 5.

Male. Length of body of body 1.4mm.

Antenna (Fig. 976) with plaque on scape black and situated close to, but below apex; dorso-basal whorls of long setae present on F1–F4 and on C1, and with a ventro-basal whorl of long setae on C1. Gaster long ovate. Otherwise as in female.

Relative measurements: head length, dorsal view 16; head length, frontal view 28; head width 38.5; mouth width 13; malar space 10; eye length 16.5; scape length 14; scape width 4; plaque length 4; pedicel length 5.5; pedicel+flagellum length 65; F1 length 5; F1 width 3.5; F2 length 8; F2 width 3; F3 length 9.5; F3 width 3.5; F4 length 10; F4 width 3.5; clava length 23; clava width 3.5; mesosoma length 45; mesosoma width 32; gaster length 45; gaster width 24; longest subbasal seta on F1, length 32.

Hosts. Unknown.

Distribution. Costa Rica.

Material examined.

Holotype ♀ COSTA RICA, Alajuela, Parque Nacional Volcan Arenal, 10º26’N, 84º43’W, 600m, 26.ii.2013, J.S. Noyes (NHMUK) . Paratype: 1♂ COSTA RICA, Limón, Reserva Biológica Hitoy-Cerere, 9º40′N, 53º02′W, 100m, 24-26.ii.2008, J.S. Noyes (NHMUK) .

Etymology. From the Latin infuscus = dark brown, referring to predominant colour of body.