Drepanoneura letitia (Donnelly 1992) comb. nov.

Figures 2 f–g, 5, 16, 27d–30d, 36d–e, 37

Epipleoneura letitia Donnelly 1992: 73 –76, figs. 5.21–5.24 (description of male and female; illustration of male S10, base of Hw, female pronotum and mesostigmal plate); — Bridges (1994: VII.133; synonymic list); — Tsuda (2000: 12; synonymic list).

Specimens examined. Total 5 ɗ (paratypes), 1 Ψ (allotype). — Panama, Panamá Province: 1 Ψ, Pipeline road, 1.7–4.8 miles NW of Gamboa, 22 v 1970, leg. E. Morton (USNM); 1 ɗ, same data but 0 1 vii 1970, leg. E.S. Morton (TWD); 1 ɗ, same data but Río Frijoles, 23 I 1975, leg. M.L. May (MM); 1 ɗ, same data but Quebrada Juan Grande, 0 9 v 1975, leg. M.L. May (TWD); 2 ɗ, Limbo river at Limbo Hunt Club, near Pipeline Rd., 8 km NW of Gamboa (09°07'N, 79°42'W), 0 9 i 1977, leg. M.L. May (MM, RWG).

Characterization. Posterior prothoracic lobe smoothly convex in male, in female smoothly concave and lacking projections (Fig. 5). Pterothoracic dorsum dark to mid-height of metepisternum (Figs. 2 f–g), with a dark stripe on metapleural suture in male, and in juvenile specimens a narrow faint yellow humeral stripe. Apex of male genital ligula with a shallow v-shaped cleft (Fig. 16 a) and latero-distal lobes short, broad, and curved medially (Fig. 16 c). Dorso-posterior margin of male S10 projected posteriorly only slightly (Figs. 27 d–28d). Ventral branch of male cercus as long as base of cercus, approximately cylindrical (Fig. 28 d), in posterior view aligned with inner margin of cercus and diverging from opposite at tip (Fig. 30 d). Paraproct pointed (Fig. 28 d). Dorsal side of sub-basal plate of ovipositor slightly concave and ventral side slightly convex (Fig. 36 d).

Diagnosis. Male of D. letitia most closely approximates D. donnellyi; both are diagnosed under the latter species. Male differs from D. flinti, D. muzoni, and D. peruviensis by the ventral branch of male cercus being aligned with cercus inner margin and diverging from the branch of opposite cercus at tip; from D. janirae by the ventral branch of cercus as long as base of cercus (Fig. 28 d) and postero-dorsal margin of S10 not or only slightly projected posteriorly (Figs. 27 d–28d), and from D. loutoni and D. tennesseni by its pointed paraproct. Female posterior lobe of pronotum of D. letitia lacks ventro-lateral processes as in D. flinti, but it is unique by its smoothly concave margin (Fig. 5). Drepanoneura letitia further differs from D. flinti by its quadrangular sub-basal plate of ovipositor (sb, Fig. 36 d), which is acutely pointed (sb, Fig. 36 c) in the latter. Biology. Adults are inconspicuous, fly close to quiet water on margins of wooded streams (Donnelly 1992).

Distribution. Panamá Province in Panama (Fig. 37).