Belciana bicolor Wileman & West, 1929

(Figs 18–20, 38, 49)

Belciana bicolor Wileman & West, 1929 . Novitates Zoologicae 35: 23. Holotype: male, Philippines, Mindanao, Subprov. Lanao, Kolambugan (NHM).

References: Poole 1989: 160 ( Belciana); Holloway 2009: 20, Pl. 1, gen. 22 male ( Belciana).

Material examined. INDONESIA, SUMATRA: 1 male Reg. Sumatera Utara, Prov. Pematangsiantar, Huta Padang, 250-330 m, 02°48′ N, 99°11′ E, Diehl E.W. leg., 6.iii.1989, slide, GB/ ZSM N4226 male, coll. Kobes, ZSM; 1 male, Reg. Sumatera Utara, Prov. Simalungen, Siantar, road via Baja Linggei to Pis Pis, (SR2) 480 m, 03°13′ N, 99°04′ E, Diehl E.W. leg., 24.iii.1991, slide GB/ ZSM N4225 male, coll. Kobes, ZSM; 1 female, Reg. Sumatera Utara, Prov. Asahan, Aek Tarum, Gunung Malayu, 02°35′ N, 98°30′ E, Diehl E.W. leg., 8.i.1983, coll. Kobes, ZSM; 1 male, same place, Diehl E.W. leg., 20/ 21.xi.1982, slide, GB/ ZSM N4176 male, coll. Kobes, ZSM; 1 female, Reg. Sumatera Utara, Dairi-West, 850-1200 m, 02°35′ N, 98°30′ E, Diehl E.W. leg., 29.iii.1981, coll. GB/ ZSM; 1 male, Reg. Sumatera Utara, Prov. Deli, Dolok Merangir, 150-180 m, 02°40′ N, 99°30′ E, Diehl E.W. leg., 4.ii.1970, GB/ ZSM N4157 male, coll. ZSM; 1 male, Reg. Sumatera Utara, Prov. Pematangsiantar, Huta Padang, 250-330 m, 2°48′ N, 99°11′ E, Diehl E.W. leg., 29.vii.1992, slide, GB/ ZSM N4177 male, coll. Kobes, ZSM; 1 male, 1 female, same place, Diehl E.W. leg., 4.ix.1991, coll. Kobes, ZSM; 2 males, 1 female, Reg. Sumatera Utara, Sondi Raya, ca. 11 km W Sondi Raya, 350 m, 02°58′ N, 99°10′ E, Diehl E.W.Diehl E.W. leg., 9- 16.v.1991, slides GB/ ZSM N4223, GB/ ZSM N4224 males, GB/ ZSM N4227 female, coll. Kobes, ZSM.

Diagnosis. Adult (Fig. 18–20). Wingspan 35–38 mm. Similar to B. prasina, but differs by smaller size, somewhat narrower and acute shape of forewing and less bright green of ground colour. Wing pattern represents half-filled dark-brown subbasal field, prominent brown patch in costal area, black-brown subapical-apical and subtornal marks and by blackish, less expressed than in B. prasina antemedial line, diffused blackish medial line, and thin postmedial line; terminal line as a row of separated black streaks; cilia brown, yellowish opposite veins.

Male genitalia (Fig. 38). Uncus similar to B. prasina, but thicker, solid; valva more rounded and stronger sclerotised compared B. prasina, with huge basal coremata; clasper and harpe stronger than in B. prasina, harpe bifurcate, with short medial extension. Aedeagus weakly sclerotised dorsally, with carina formed by two sclerotised, but not scobinate bands; vesica basally bulbous, with patch of 17–18 cornuti on basal diverticula, and with cluster of moderate small spines in joining with ventral branch of carina.

Female genitalia (Fig. 49). In the the female genitalia antrum well formed, one third long as in B. prasina, not split; ductus bursae very short, slightly sclerotised and ribbed in joining with corpus bursae; the late sack-like, with extension in caudal part, not sclerotised and ribbed in caudal part, as B. prasina .

Distribution and bionomics. Malaysia, Borneo (Kalimantan, Timor), Brunei (Seria, Ulu Temburong), Indonesia (Sumatra), Philippines (Mindanao I.). The species occurs in lowlands and mountain areas at elevation range 150–1120 m. Moth were collected in January, February, March, May, June, July, and December.