Dentalion apon sp. nov.

(Figs 14–18, 51, 59, 60)

Diagnosis. Scutellum with 2 pairs of setae, one anterior and one posterior (Fig. 17); frontal suture reaching eyes at a level equal to half distance between posterior margin of anterior ocellus and anterior margin of posterior ocelli (Fig. 15); forewing costal cell ventrally with a sparse row of setae in apical ½ (Fig. 51).

Similar to D. quadrifer except frons and vertex with much weaker reticulation (Figs 14, 15) and mesoscutum and scutellum with distinctly larger meshes (Fig. 17).

Description. FEMALE. Length 1.4 mm. Scape yellowish-brown with dorsal edge dark brown, pedicel and flagellum dark brown. Frons metallic purple. Vertex golden-green. Mesoscutum, scutellum and propodeum metallic bluish-green. Coxae dark and metallic; femora and tibiae dark brown; tarsi with tarsomeres 1–3 white, 4 dark brown. Forewing hyaline. Gaster with tergites 1 and 2 metallic bluish-purple, remaining tergites dark brown with metallic tinges.

Antenna as in Fig. 59. Frons with raised, weak reticulation (Fig. 14); frontal suture reaching eyes at a level equal to half distance between posterior margin of anterior ocellus and anterior margin of posterior ocelli. Vertex with engraved, weak reticulation (Fig. 16). Occipital margin rounded. Eyes with sparse, scattered hairs (Figs 14– 16).

Pronotum without transverse carina close to posterior margin (Fig. 17). Mesoscutum with raised, strong reticulation (Fig. 17); notauli as narrow distinct grooves in anterior 1/3, not visible in posterior 2/3. Scutellum with raised, strong reticulation (Fig. 17); with 2 pairs of setae. Propodeum smooth except for irregular longitudinal carinae medially (Fig. 18); callus with 2 setae. Forewing speculum closed below; costal cell ventrally with a sparse row of setae in apical ½.

Petiole 0.4X as long as wide, smooth. Gaster elongate with apex acuminate; tergites smooth.

MALE. Length 1.4 mm. Colour as in female. Antenna as in Fig. 60; head otherwise as in female (Fig. 16). Mesosoma and metasoma as in female.

Material examined. Holotype female (INBio) labelled “ COSTA RICA, Guanacaste, A.C.T. Bagaces, Parque Nacional Palo Verde, Sct Palo Verde, Extremo E de campo de Aterrizaje, 50 m, 9.xii.1999 – 5.i.2000, I. Jiménez, LN 260952 /385020, #54957”. Paratype. 1ɗ on card. COSTA RICA: Guanacaste, from same locality as holotype but collected 9.ii–12.iii.2001 (INBio).

Etymology. No specific meaning intended.

Distribution. Costa Rica.