Torodora rectivalvata Park, sp. nov.

Torodora rectivalvata Park, sp. nov.

(Figs. 7, 14, 14 a, 17)

Type. HOLOTYPE ɗ, Chiang Mai, Doi Inthanon, ca. 1300 m, Thailand, 30.V.1983 (Kurok Moriuti, Arita, & Yoshiyasu), gen. prep. no. CIS-4960. PARATYPE. 1&, same locality, 1, 3.XI.1985 (Moriuti, Saito, & Arita), gen. prep. no. CIS-5244.

Diagnosis. Torodora rectivalvata is superficially similar to T. spinula but the ground color of the forewing is paler than any other species. The male genitalia provide the most diagnostic differences: valva with the costa nearly straight in the basal half, and the distal part nearly triangular; and the juxta with a heavily sclerotized, large triangular median flap.

Description. Male and female. Forewing length 17.5–18.0 mm. Head grayish orange. Tegula and thorax brownish orange. Antenna with pedicel pale brownish orange, shiny dorsally; flagellum pale brownish orange throughout, without clear annulations. Second segment of labial palpus brownish orange on outer surface, paler on inner surface; 3rd segment as long as second, dark brown ventrally. Forewing elongate, broader towards apex; ground color shiny brownish orange, often with large pale orange, quadrate area mesially on upper surface; apex obtuse; termen oblique, slightly concave mesially; fringe golden brown at basal half, paler beyond. R3 stalked at basal 1/3; R4 and R5 stalked beyond basal 2/3; R5 to termen; M1 close at base; M2 and M3 connate at base; M3 and CuA1 stalked near basal 1/3. Hindwing pale yellowish brown; apex acute; M3 and CuA1 stalked beyond 2/3; fringe golden brown. Hind tibia with brownish hairlike setae in distal half dorsally.

Male genitalia (Figs. 14, 14 a). Eighth sternum broadly convex, spinous zone dense and narrow. Uncus funnel-shaped; caudal margin nearly straight. Ganthos broad basally, strongly curved beyond middle. Costa of valva nearly straight, without subbasal expansion; distal part almost triangular, narrowed toward apex. Juxta with short, digitate or triangular lateral lobes, widely separated; median flap well developed, free, large, triangular, heavily sclerotized. Aedeagus short; with a pair of bar-shaped cornuti of comparable length, one thin, one much stouter.

Female genitalia (Fig. 17). Eighth sternum slightly emarginate at middle. Apophysis anterioris very short. Ostium bursae broad; anterior margin concave. Antrum heavily sclerotized, long, broad, about as long as ductus bursae. Ductus bursae membranous, narrow. Corpus bursae ovate, large; signum strawberry-shaped, with numerous conical spines on surface, about 1/4 as long as corpus bursa.

Distribution. Thailand (Chiang Mai)

Etymology. The species name is derived from the Latin, rectus (= straight), referring to the straight costa of the valva.