Drepanoneura peruviensis (Fraser 1946) comb. nov.

Figures 1 a, 2l–m, 8, 19, 27g – 30g, 36i, 37

Protoneura peruviensis Fraser 1946: 459 –460, figs. 5a–b (description of male, illustration of male S10); — Soukup (1954: 13; listed from Peru); — Rácenis (1959: 472; listed from Peru); — Kimmins (1966: 209; type catalog); — Davies & Tobin (1984: 117; synonymic list); — Steinmann (1997: 453; synonymic list).

Epipleoneura peruviensis Bridges (1994: VII.184; synonymic list); — Tsuda (2000: 12; synonymic list).

Specimens examined. Total 4 ɗ, 2 Ψ. — Holotype ɗ, Peru, Loreto Department, Mishuyacu [near Iquitos] (03°51'S, 73°13'W), 0 2 vii 1930 (BMNH); 1 ɗ, same data as holotype but Río Amazonas, Iquitos, ix 1938, leg. G.G. Klug (RWG); 2 ɗ, same data but i/ iv 1940 (RWG); 2 Ψ, same data but vi 1939 (RWG).

Characterization. Posterior prothoracic lobe smoothly convex in male, with a wide and short semicircular medio-ventral projection in female (Fig. 8). Pterothoracic dorsum dark to upper 0.7 of metapleural suture in male (Fig. 2 l), to mid-height of metepisternum and with a black stripe along anterior margin of metapleural suture in female (Fig. 2 m). Apex of male genital ligula with a deep u-shaped cleft (Fig. 19 a) and latero-distal lobes short, broad, and curved medially (Figs. 19 b–c). Dorso-posterior margin of male S10 projected posteriorly (Figs. 27 g– 28g). Ventral branch of male cercus longer than base of cercus, approximately cylindrical (Fig. 28 g), in posterior view arising at mid-width and convergent to branch of opposite cercus at tip (Fig. 30 g). Paraproct pointed (Fig. 28 g). Ventral and dorsal sides of sub-basal plate of female ovipositor linear (Fig. 36 i).

Diagnosis. Male of D. peruviensis shares the ventral branch of cercus arising at mid-width and convergent to the branch of opposite cercus at tip only with D. flinti and D. muzoni (Fig. 30 g); it differs from both by having the apex of genital ligula with a deep u-shaped cleft (Fig. 19 a), and further from D. muzoni by the ventral branch of male cercus being longer than the base of cercus (Fig. 28 g) and the absence of pale mesepisternal stripes (Fig. 2 l). Female is unique by the presence of a medio-ventral semicircular projection on posterior margin of pronotum (Fig. 8) and by both ventral and dorsal sides of sub-basal plate of ovipositor linear (Fig. 36 i).

Biology. Adults were collected at streams and rivers.

Distribution. Loreto Department, Peru (Fig. 37).