Chinasa costalis bicoloriceps (Strand, 1916), comb. nov.

(Figs. 20–21, 34–43)

Eilema venosa bicoloriceps Strand, 1916, Archiv für Naturgeschichte, 1916 (A3): 114 (Type locality: “[Formosa] Suisharyo” [TaiWan]).

Eilema venosa bicoloriceps: Strand 1922: 592; Inoue & Kishida 1992: 166.

Material examined. TAIWAN: 4 ♂, 11 ♀, ProV. Taichung, Anmashan, lower forest zone, 1650 m, 20.VI.1997, leg. B. Herczig & L . Ronkay (Coll. MWM/ ZSM); 5 ♂, 2 ♀, Prov. Ilan, 1200 m, Ming Chyr Forest Recreation Area, 4–5.VI.1997, leg. B. Herczig & L . Ronkay (Coll. MWM/ ZSM); 1 ♂, 5 ♀, Prov. Ping-Tung, 10 km SE of Mutan, 470 m, 03/ 04.VII.1996, leg.: G. Csorba & L. Németh (Coll. MWM/ ZSM); 5 ♂, 4 ♀, Prov. Kaohsiung, Tengchih Forest Recreation Area, 1200 m, 19.V.1997, leg.: Gy. M. László & G. László, slide MWM 31561 Volynkin (♂) (Coll. MWM/ ZSM); 1 ♀, Prov. Nan-Tou , 5 km W of Lu-shan hot spring, 22.IV.1997, leg. Gy. Fábián & S . T. Kovács, slide MWM 31587 Volynkin (♀) ( Coll. MWM/ ZSM); 1 ♀, Prov. Nan-Tau, Meimu, 2000 m, 28.X.1996, leg. Gy. Fábián & F . Nemes (Coll. MWM/ZSM).

Description. Adults (Figs. 20–21). Forewing length 11.5– 13 mm in males and 14–14.5 mm in females. Wing pattern typical for the genus: forewings brown, costal margin broadly yellow, but at apeX with brown stroke, yellow dash is Visible on outer margin behind apeX; this dash is crossed by dark Veins; dark postmedian costal spot presented. Hindwing unicolorous yellowish-brown, its apical and outer parts with brownish tint. Male genitalia (Fig. 34). Uncus slightly widened at apeX, with clear apical denticle; cucullus slightly wider than sacculus; dorsal edge of cucullus apeX rectangular, Ventral – rounded; distal saccular process narrow, apically pointed, bent dorsally; aedeagus slightly S-shaped, Vesica membranous, with elongate diVerticulum constricted apically and haVing a small finger-like subbasal subdiVerticulum, Vesica ejaculatorius originating subbasally. Female genitalia (Fig. 43). OVipositor short and broad; apophyses anteriores and posteriores of same length, long and thin; ductus bursae slightly sclerotized, dorso-Ventrally flattened, narrowed posteriorly; corpus bursae pear-like, membranous, without signa.

Remark. The subspecies has slightly narrower forewings of both seXes with more straight costa, and a larger postmedian costal spot than the nominate subspecies. NeVertheless, the male and female genitalia of two subspecies haVe no significant differences.

Distribution. Taiwan.