Peridaedala nigrifasciana, sp. nov.

Figs. 25, 68

Holotype. ♀, Bhutan, Wangdue Phodrang, Phobjikha, 27º27´55´´N, 90º10´11´´E, 2890 m, 14.viii.2016, sta. 21, C. Gielis, genitalia slide FG3335 (NBCS).

Diagnosis. Peridaedala nigrifasciana has a green forewing with an irregular, oblique, black-brown spot. The forewing pattern alone distinguishes it from it all other congeners.

Description. Male unknown. Female. Head (Fig. 25): Green, labial palpus sinuate, length about 2 times diameter of compound eye, black-brown, green in distal half. Thorax: Nota and tegulae green. Forewing length 8 mm; forewing subtriangular, costa slightly curved, apex protruding, dorsum straight; subbasal fascia indicated by a small triangular spot; median fascia an interrupted band consisting of an irregular oblique spot from costa to middle of cell and an oblique dorsal spot with a short inner band along dorsum; a curved apical spot. Fringe green. Hindwings whitish fuscous. Fringe concolorous with wing with a darker subbasal band. Abdomen: Genitalia (Fig. 68) with papillae anales moderate, apophyses posteriores about twice as long as apophyses anteriores; sterigma broad cup-shaped, laterally pointed, fused with and fitting into concavity of sternite 7; sternite 7 rounded-trapezoidal, spinulose; lamella postvaginalis a hairy plate bordered by a slender, sclerotized, sinuate ribbon, protruding in middle, lamella antevaginalis a slender and concave, sclerotized, band; ductus bursae about one-half length of corpus bursae; colliculum short and bifurcate, situated in distal one-half of ductus; corpus bursae ovate, spinulose in centre and distal half, with two short, slender, blade-shaped signa.

Distribution. Bhutan.

Remarks. The forewings of he specimen are damaged.

Etymology. The name nigrifasciana refers to the remarkable black median fascia.