Galeopsomyia blakeae Hansson sp.nov.

(Figs 26, 308, 309, 965, 1068)

Diagnosis (female). Antennal clava with distinct constriction between C1 and C2 (Fig. 1068); with a weak genal carina close to mouth opening; mesoscutellum (Fig. 308) with submedian grooves parallel, median part with weak reticulation; dorsellum with median carina; propodeum (Fig. 308) with strong reticulation, callus with three setae; petiole very short, just a narrow band; gaster (Fig. 308) 2.2× as long as wide, medio-basal Gt1 with a carina shaped like an inverted U (Fig. 26), gonoplac yellowish-brown (Fig. 309).

Female holotype: length of body 1.9mm (paratypes 1.8–2.1mm).

Scape yellowish-brown, pedicel pale brown, flagellum brown. Head dark brown with bluish-green tinges, clypeus yellowish-brown. Mesosoma dark brown. Legs with fore and mid coxae yellowish-brown, hind coxa brown; trochanters, femora and tibiae yellowish-white; T1–3 yellowish-white, T4 brown. Petiole dark brown. Gaster dark brown; gonoplac yellowish-brown.

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

Mesoscutum with strong reticulation, meshes isodiametric on sidelobes, elongate on midlobe, midlobe with parts close to notauli rugose; midlobe with a complete median groove, with 22 scattered adnotaular setae. Mesoscutellum with median part with weak reticulation and shiny; submedian grooves ±distinct, straight and parallel; lateral parts with strong reticulation and with 16 scattered setae. Dorsellum with strong reticulation, with median carina. Propodeum with a strong median carina that expands slightly in posterior part; with strong reticulation; callus with three setae. Fore and mid coxae with weak reticulation, hind coxa with strong reticulation. Fore wing with five setae on dorsal surface of submarginal vein; speculum open below; costal setal row unbroken.

Petiole very short, just a narrow band. Gaster elongate; medio-basal Gt1 with a carina shaped like an inverted U, tergites with strong reticulation.

Relative measurements: head length, dorsal view 22; head length, frontal view 33; POL 9; OOL 5.5; lateral ocellus diameter 3.5; head width 42; mouth width 15.5; malar space 11; eye length 18; scape length 16.5; scape width 4; pedicel+flagellum length 44; pedicel length 6; pedicel width, dorsal view 3.5; F1 length 7; F1 width 4; F2 length 6.5; F2 width 4; F3 length 6.5; F3 width 5; clava length 15; clava width 5.2; C3 length 5; spicule length 1.5; mesosoma length 55; mesosoma width 40; midlobe of mesoscutum length 19; mesoscutellum length 21; mesoscutellum width 17.5; median part of mesoscutellum width (measured medially) 6; median part of mesoscutellum, width in anterior part 6; median part of mesoscutellum, width in posterior part 7; lateral part of mesoscutellum, width (measured medially) 4; dorsellum length 4; propodeum length 9; costal cell length 32; costal cell width (measured at widest part) 2; marginal vein length 30; stigmal vein length 10; gaster length 75; gaster width 34; Gt2 length (measured medially) 8; Gt 4 length (measured medially) 12; Gt 7 length (measured medially) 10; Gt

7 width (measured at base) 12; longest cercal seta length 10; shortest cercal seta length 5.

Male. Length of body of body 1.3–1.8mm.

Antenna (Fig. 965) with scape widest in median part; plaque dark brown and extending along entire scape; 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 22; head length, frontal view 35; head width 43.5; mouth width 17; malar space 11; eye length 19.5; scape length 19; scape width 7; plaque length 17; pedicel length 6; pedicel+flagellum length 59; F1 length 5; F1 width 4; F2 length 8; F2 width 4; F3 length 9; F3 width 4; F4 length 9; F4 width 4; clava length 23; clava width 4.5; mesosoma length 57; mesosoma width 42; gaster length 60; gaster width 30; longest subbasal seta on F1, length 32.

Hosts. Reared from stem gall on Blakea grandiflora ( Melastomataceae). The gall is multilocular and consists of an elongate swellng, about 2.5 cm in length.

Distribution. Costa Rica.

Material examined.

Holotype ♀ COSTA RICA, Puntarenas, Monteverde, v.2002, ex Blakea grandiflora stem gall (NHMUK) . Paratypes: 3♀ 4♂ with same label data as holotype (MZUCR, NHMUK) .

Etymology. Named after the host plant of the gall from which this species was reared.

Remarks. The specimens in the type series are bleached by (sun)light.