Russelliana

Head, in profile, weakly (<45°) to strongly (45–90°) inclined from longitudinal body axis. Median and distal labium segments 0.1–0.5 (rarely 0.6–0.7) times as long as head width. Pronotum lacking tubercles, or with one to three tubercles on either side. Metatibia 0.4–0.9 times as long as head width, without basal spine, with a crown of ungrouped or indistinctly grouped 4–9 apical spurs. Forewing membrane colourless or whitish to bright yellow (rarely brown to black), often becoming darker towards apex, with or without pattern; surface spinules often present in all cells, weakly to strongly developed, sometimes with radular spinules covering triangular (rarely rounded) areas along the margin of cells r2, m1, m2 and cu1; sometimes surface spinules absent in apical third of the wing but base of cell cu2 and area between clavus and vein A always covered with fine surface spinules; veins with short (rarely long) microscopical setae in comparison with vein width, more densely spaced towards wing base. Distal segment of aedeagus elongate to massive, weakly to strongly expanding towards apex. Subgenital plate relatively short, elongate to subglobular; covered with short to long setae except for base, rarely with a row of bristles along dorsal margin; outer face covered with short to long setae mostly in apical half. Segment 10 usually with a pair of subequal terminal setae.

Literature