Grotiusomyia azofeifai sp. nov.

Figs 5, 25, 26, 53, 54, 80, 97

Diagnosis. Mandibles yellowish-brown with a row of small teeth at apex (as in Fig. 112); flagellum dark brown, 1.0× as long as width of mesoscutum, F4 1.1× as long as wide, apex of clava pointed (Figs 5, 53); frons between scrobes and eyes and vertex with strong reticulation (Fig. 97); occipital margin with a sharp edge behind ocellar triangle (Fig. 80); mesoscutum and mesoscutellum with same reticulation (Fig. 25); mesoscutum black with metallic tinges and mesoscutellum golden-purplish; mesoscutellum convex; dorsellum flat, smooth and shiny, posterior margin evenly rounded; fore wing with 4–8 setae in apico-dorsal part of costal cell, completely hyaline (Fig. 5); fore coxa pale brown, mid coxa yellowish-brown (Fig. 5); gaster (Fig. 25) 2.4× as long as wide; Gt 1 0.4× as long as length of gaster, dorsal surface smooth, posterior margin curved slightly forwards; Gt 6 0.2× as long as length of gaster with anterior part 2.1× as wide as width of posterior part, posterior margin curved backwards with sharp edge. Male: gaster with a pale spot in medio-basal part (Fig. 26).

Description (female holotype). Length 1.6 mm. Frons between scrobes and eyes and vertex with strong reticulation, scrobes smooth. Mandibles with a row of small teeth at apex. Occipital margin with a sharp edge behind ocellar triangle. Dorsellum flat, smooth and shiny, posterior margin evenly rounded. Propodeal callus with seven setae. Fore wing with six setae on dorsal surface of submarginal vein; with 14 admarginal setae; costal cell with 30 setae on ventral surface in two rows, apico-dorsal margin with five setae; speculum distinct and closed below. Gaster long ovate; Gt 1 smooth and shiny without sculpture, remaining tergites with weak reticulation; Gt 1 with posterior margin curved slightly forwards, Gt 6 with posterior margin curved backwards.

Colour. Frons and vertex metallic bluish-green, scrobes black with metallic tinges. Mandibles yellowish-brown. Antennae with scape yellowish-brown, pedicel pale brown, flagellum dark brown. Mesoscutum and propodeum black with metallic tinges, mesoscutellum golden-purplish. Legs with fore coxa pale brown, mid coxa yellowish-brown, hind coxa black with metallic tinges; hind femur dark brown, remaining parts of legs yellowish-white. Gaster with Gt 1 metallic bluish-green, remaining tergites black with metallic purple tinges.

Relative measurements: head length, dorsal view 19; head length, frontal view 28; head width 39; POL 7; OOL 4.5; mouth width 10; malar space 5; eye length 22; lateral ocellus diameter 4; scape length 13; scape width 3.5; pedicel length 5; pedicel width. dorsal view 3; flagellum length 33; F1 length 5; F1 width 4; F2 length 5.5; F2 width 4; F3 length 5; F3 width 4.5; F4 length 5; F4 width 4.5; clava length 11; clava width 4.5; pronotum length 12; pronotum width 25; mesosoma length 52; mesosoma width 32; midlobe of mesoscutum length 17; mesoscutellum length 17; mesoscutellum width 15.5; propodeum length 10; hind tibia length 33; hind tibial spur1 length 6; hind tibial spur2 length 3; hind tarsus length 25; hind basitarsus length 6; fore wing length 92; fore wing width 38; costal cell length 24; costal cell width 3; marginal vein length 28; postmarginal vein length 12; stigmal vein length 7.5; Gt 1 length 20; Gt 6 length 10; Gt 6 width at base 21; Gt 6 width at apex 10; gaster length 52; gaster width 22.

Variation. Length 1.1–1.6 mm. Costal cell with 4–8 setae in apico-dorsal part. Propodeal callus with 4–8 setae.

Male. Length 1.4 mm. Gt 1-2 yellowish-white with lateral margins dark brown. Otherwise as in female.

Relative measurements: head length, dorsal view 17; head width 38; eye length 19; scape length 12; scape width 3.5; flagellum length 35; F1 length 5.5; F1 width 4; F2 length 5; F2 width 4; F3 length 6; F3 width 5; F4 length 6; F4 width 5; clava length 10.5; clava width 5; Gt 1 length 16; gaster length 44; gaster width 22.

Distribution. Costa Rica.

Etymology. Named in honor of Antonio (Tonio) Azofeifa, one of the collectors of type material.

Material. Holotype female: COSTA RICA, Heredia, Estación Biológica La Selva, 10º26′N, 84º01′W, 50m, 22.i-2.ii.1991, J.S.Noyes (NHMUK). Paratypes (15♀ 1♁, MZLU, MZUCR, NHMUK): 2♀ with same label data as holotype; following from same locality as holotype but collected x.1995 (1♀), 28-29.ii.2008 (3♀), 24-25.ii.2011 (2♀); 1♀ COSTA RICA, Heredia, Reserva Privada Selva Verde, 10º27′N, 84º04′W, 75m, 13.iii.2005, C. Hansson; 1♀ COSTA RICA, Puntarenas, Reserva Privada Karen Mogensen, 9º52′N, 85º03′W, 305m, 11-21.ii.2005, C. Hansson; following from same locality as previous but collected 23-24.ii.2007 (3♀), 23-24.ii.2013 (1♀); 1♀ COSTA RICA, Puntarenas, Golfito, Estación Agujas. LS 526550 _276750, 250- 350m, 2-22.x.1999, J. Azofeifa; 1 ♁ COSTA RICA, Puntarenas, San Vito, Las Cruces, Wilson Botanico, 8º47′N, 82º58′W, 1000–1300m, 7-19.ii.2007, C. Hansson.