Tachytrechus alatus (Becker)

(Figs. 1, 13)

Syntomoneurum alatum Becker 1922: 124 .

Tachytrechus alatus (Becker): Brooks 2005: 121.

Diagnosis. Body length 6.4–7.1 mm, wing length 6.6 mm – 7.5 mm; face and clypeus coppery with green reflections; clypeus rounded below; 1 notopleural bristle; male fore tarsus with basal three-quarters of basitarsus and tarsomeres 3–5 flattened and silvery on anterior surface; hind femur mainly yellow with 1 anterior preapical bristle; M with two 90° bends; R4+5 and M parallel distally (Figs. 1A, 1B); male wing with two adjacent swellings of the costa immediately proximal to insertion of R1, R2+3 very short, ending at costa before midpoint of wing, crossvein dm-cu close to wing base (Fig. 1A); female wing with R2+3 ending beyond midpoint of wing, crossvein dm-cu slightly before midpoint of wing (Fig. 1B); abdominal tergite 5 of male with large posterior membranous region, extended laterally as broad band to ventral margin of sclerite; hypopygium (Figs. 1C, 1D): right basiventral epandrial lobe with rounded basal projection and subquadrate inner distal projection, left basiventral epandrial lobe weakly developed; apicoventral epandrial lobe moderately developed, subquadrate in lateral view, short, projected posteriorly; accessory epandrial process present medial to apicoventral epandrial lobe; ventral surstylar lobe with series of parallel diagonal ridges on ventral surface; apicoventral arm of postgonite with medial process present, apex with hook-like process; cercus subquadrate in dorsal view, apical and lateral margin dark; right margin of hypandrium with pair of sickle-shaped projections; phallus with weakly sclerotized fin-like projection near middle. Female sternite 8 undivided, lacking medial invagination.

Type material examined. Lectotype ɗ, PERU: Pasco, road to Rio Pichis, 300–700 m, 4.i.1904, C.A.W. Schnuse (ZMHB). Paralectotypes, 1ɗ and 4Ψ (SMTD), 1Ψ (ZMHB) all from same locality as holotype.

Distribution. Tachytrechus alatus is known only from the type locality near the Rio Pichis in Peru (Fig. 13).