Macrostemum fastosum Walker, 1852

Macrostemum fastosum Walker, 1852 View in CoL

( Figs. 90–94 View Figs )

Macrostemum fastosum Walker, 1852: 76 View in CoL [ Holotype male; Hong Kong; BMNH]; Malicky, 1998b: 769 (redescription).

Macronema tripunctatum Banks, 1924: 451 [ Holotype male; Philippines; MCZ; synonymised by Fischer, 1963: 186].

Diagnosis. Male. Antennae 35 mm in length. Antennal flagellum brown; darker colour of striations not obvious. Forewing 14 mm and hind wing 7 mm in length with dark brown stripe along middle of forewing; apex with evident dark brown markings ( Fig. 90 View Figs ). Mesoscutum and mesoscutellum without evident markings. Tibial spurs 2.4.4.

Male genitalia. Inferior appendages two-segmented, harpago long. In lateral view, phallus with longer posterior area of apex ( Fig. 93 View Figs ). In dorsal view, segment X divided at middle and pointed toward apex laterally ( Fig. 92 View Figs ).

Female. Antennae 30 mm in length. Antennal flagellum dark brown in first few segments, and lighter throughout. Forewing 14 mm and hind wing 9 mm in length, same pattern as male. Mesoscutum and mesoscutellum without evident markings. Tibial spurs 2.4.4.

Material examined. Thailand: 20 males, 15 females, Mae Kampong, Mae La stream, coll. C.J. Uy, 14 May 2015 ( UPLBMNH) ; Vietnam: 7 males, 13 females, Tam Dao , coll. H. Malicky, 19 May–13 June 1995 (HMPC) ; Indonesia: 7 males, 13 females, Sumatra, Simarito , coll. H. Malicky, 14 February 1994 (HMPC) ; Laos: 1 female, Luang Prabang Province, coll. C. Holzschuh, 24 April–16 May 1999 (HMPC).

Distribution. Burma, China, India, Java, Bali, Laos, Malaysia ( Perak), Nepal, Philippines, Thailand, Vietnam.

Remarks. This species can be easily distinguished from other congeners from its distinct wing pattern ( Fig. 90 View Figs ). However, we observed that specimens from Vietnam have thicker brown stripes on forewings. Other diagnostic characters are illustrated in Figs. 91–94 View Figs .