Nelidina DeLong, 1953

Coloration. Golden yellow (Figs 28–33) without distinct maculae.

External morphology. Head (Figs 28, 30, 32), in dorsal view, narrower than pronotum. Crown (Fig. 28) subpentagonal, slightly produced anteriorly; anterior margin rounded or slightly angled, with distinct carina at crown-face transition; lateral margins, adjacent to eyes, raised and not carinated; surface flat and smooth. Ocelli on crown, adjacent to anterior margin. Antennal ledge oblique and carinate. Frons, in frontal view (Figs 1, 10, 19), about twice as long as wide; in lateral view (Fig. 29), convex. Clypeus (Figs 1, 10, 19) rectangular, with parallel lateral margins. Forewing (Figs 2, 11, 20) semi-hyaline; venation mostly indistinct, except for veins delimiting apical cells; four apical cells and three anteapical cells visible only apically; appendix narrow, extending only along first apical cell. Hind wing with three apical cells, R4+5 and M1+2 convergent pre-apically, fused at apex, forming single vein. Foreleg with femoral AD, AM and PD rows reduced and poorly defined, except for apical setae AD1, AM1 and PD1; AV row formed by three or four sparse setae, restricted to distal portion; IC row formed by slightly arched comb of fine setae, beginning at distal half of femur and extending to near apex. Hind leg with femoral setal formula 2:2:1; metatibial AD row with two or three intercalary microsetae between macrosetae; first tarsomere with two parallel rows of small setae on plantar surface; apex with five platellae; second tarsomere apex with three apical platellae.

Male terminalia. Pygofer (Figs 3, 12, 21) usually with dorsoapical lobe, tooth or process; macrosetae absent. Subgenital plates (Figs 5, 14, 23) longer than pygofer; fused to each other basally; apex rounded or truncated; ventral surface with macrosetae on apical third; in lateral view (Figs 4, 13, 22), without apical tooth. Style (Figs 6, 15, 24) long; preapical lobe absent; apex sclerotized and slightly curved ventrally. Connective (Figs 7, 16, 25) Yshaped; stem bifurcated at articulation with aedeagus. Aedeagus (Figs 8, 9, 17, 18, 26, 27) with shaft long and narrow; with at least one pair of processes on apical third; gonopore apical. Anal tube (Figs 3, 12, 21) without processes.