Psychoda silvensis, sp. nov.

(Figs 132–139)

Etymology. The species name, silvensis, is based on the type locality.

Diagnosis. Palpal formula 1.0:1.0:1.1:1.3; subgenital plate longer than wide with basal band projecting medially as an inverted V; setae absent on basal region on subgenital plate; genital digit present.

Female. Head (Fig. 132): vertex, frons and clypeus pilose; hair patch of frons extending to facet row 1, almost reaching hair patch of vertex; eye bridge with 4 facets; eyes separated by 1.2–1.3 facet diameters; 7–8 supra-ocular setae; interocular suture absent; clypeus with 3 stronger lateral alveoli; frontoclypeal suture absent; antenna incomplete; scape cylindrical, 1.5 the length of the subspherical pedicel (Fig. 133); ascoids in Y; palpal formula 1.0:1.0(1.0–1.1):1.1:1.3(1.25–1.3) (Fig. 134); labellum with 3 apical teeth and 2 lateral setae (Fig. 135). Wing (Fig. 136): Sc vein ending just beyond base of vein Rs; radial and medial forks complete; veins R5, CuA1 and costal cell slightly darkened. Distitarsus without apical projection (Fig. 137). Terminalia: subgenital plate longer than wide, bilobed, pilose except on basal region, with basal band projecting medially as an inverted V (Fig. 138); genital digit present; subgenital plate internally with a transversal line next to the base and concave lines next to the genital digit (Fig. 139); genital chamber wider than long, elliptical (Fig. 138).

Male. Unknown.

Material examined. Holotype Ƥ BRAZIL, Amazonas, Silves, Saracá, 30.vi.1997, 6cdc – 1m, no collector name (INPA). Paratypes: 1 Ƥ Amazonas, Silves, Saracá, área alterada, 29.v.1997, 7cdc – m, col. TVB/FLS (INPA); 1 Ƥ Amazonas, Silves, Saracá, 30.vi.1997, 6cdc – 1m, no collector name (MZUEFS).

Distribution. Brazil (Amazonas).

Comments. The general shape of subgenital plate in P. serrana sp. nov., P. silvensis sp. nov. and Psychoda undulata Tonnoir (Uganda) is similar but this three species can be differenciated by the internal ornamentation of this plate.

As the apical flagellomeres are missing, this species cannot be assigned to any subgenera.