Diglyphomorphomyia albiclava sp. nov.

Figs 1, 2, 25

Diagnosis. Body including legs and entire frons yellowish-brown to pale brown (Figs 1, 2), antenna with F1–3 dark brown, F4 and clava yellowish-white (Fig. 1), fore wing infumate with median one-third darker (Figs 1, 2); pronotal collar without a carina along anterior margin (Fig. 2); midlobe of mesoscutum with two pairs of long and strong setae (Fig. 2); mesoscutellum with sublateral grooves ±straight in lateral part, joining in posterior part (Fig. 2).

Description (female holotype). Length 1.9mm. Frons and vertex with weak reticulation; Pronotal collar without a carina along anterior margin. Mesoscutum, mesoscutellum, dorsellum and propodeum with very weak reticulation, almost smooth; midlobe of mesoscutum with two pairs of long and strong setae; mesoscutellum with sublateral grooves joining in posterior part; propodeal callus with six setae. Fore wing with six setae on dorsal surface of submarginal vein; with 20 admarginal setae; costal cell with a row of ten setae on ventral surface, apico-dorsal margin with three setae. Gaster short ovate.

Colour. Head including antennal scrobes yellowish-brown, occiput around occipital foramen dark brown. Antennae with scape yellowish-brown, pedicel and F1–3 dark brown, F4 and clava yellowish-white. Mesoscutum, mesoscutellum, dorsellum and propodeum yellowish-brown, mesoscutum darkest. Legs with coxae and trochanters pale brown, remaining parts of legs yellowish-brown. Wings infumate, fore wing with median one-third infuscate. Petiole and gaster yellowish-brown, Gt 2–3 dark brown, gonoplac pale brown.

Relative measurements. Head: length in dorsal view 22; length in frontal view 34; width 53; POL 10; OOL 7; mouth width 16; malar space 9.5; eye height 23; lateral ocellus maximum width 4; scape length 22; scape width 3.5; pedicel length 7; pedicel width in dorsal view 4; pedicel+flagellum length 52; F1 length 11; F2 length 8; F3 length 8; F4 length 6.5; antennal clava length 11; F1 width 4; F2 width 5; F3 width 6; F4 width 6.2; antennal clava width 6.2. Mesosoma: length 63; width 44; midlobe of mesoscutum length 22; mesoscutellum length 28; mesoscutellum width 22; dorsellum length 2; propodeum length 12; mid tarsus length 23.5; mid tarsus T4 length 5; hind tarsus length 23; hind tarsus T4 length 4.5; fore wing length 67; fore wing width 45; costal cell length 28; costal cell width 2; marginal vein length 33; postmarginal vein length 9; stigmal vein length 9.5. Gaster: length 60; width 47; Gt 1 length 33; Gt

7 length 4; Gt

7 width 14.

Variation in paratypes. Length 1.7–1.8mm. Antenna with pedicel yellowish-brown to dark brown. Fore wing submarginal vein with 4–5 setae on dorsal surface. Otherwise as in holotype.

Male. Unknown.

Distribution. Belize, Costa Rica.

Etymology. From the Latin albus = white, and clava = club, referring to the yellowish-white antennal clava.

Material. Holotype female: BELIZE, Las Cruces, iii.1996, T. King & D. Howe (NHMUK). Paratypes (2♀, MZLU, NHMUK): 1♀ COSTA RICA, Cartago, Turrialba, 650m, viii.1994, P. Hanson; 1♀ COSTA RICA, Limón, Reserva Biológica Hitoy Cerere, 9º40’N, 83º02’W, 100m, 24–25.ii.2004, J.S. Noyes ..