The N. diehli species-group

Diagnosis. The single known member of the species group differs clearly from other congeners in its unusual ochreous-yellow body and wing coloration, only N. taprobana has similar forewing coloration, but it is darker, ochreous, and, in addition, it differs from N. diehli sp. nov. in the whitish upperside of the abdomen (which if ochreous-yellow in N. diehli sp. nov.) the much smaller size, the absence of longitudinal dark strokes in the postmedial area, and the presence of dark suffusion on hindwings. In the male genitalia the broad vesica with the very large, curved subbasal diverticulum is characteristic for the species-group.

Description of external morphology. Head and thorax ochreous-yellow, abdomen pale ochreous, with yellow suffusion. Forewing ground color ochreous-yellow; pattern diffuse, dark grey; subbasal line as small dot; antemedial line thin, S-like curved; medial line broad, shade-like, slightly curved; postmedial line thin, slightly curved; in subterminal area diffuse strokes along veins, which may merge into broad shade; terminal line as row of dots on veins, sometimes connected with strokes on veins; medial spot absent; discal spot presented as complex of two short and thin strokes of different size in males; cilia ochreous-yellow. Hindwing pale yellowish; medial transverse line as diffuse grayish shade; discal spot narrow, V-shaped; cilia pale yellowish.