Review of the filter-feeding caddisfly subfamily Macronematinae (Trichoptera: Hydropsychidae) in tropical Southeast Asia Author Uy, Christine Jewel C. Author Malicky, Hans Author Bae, Yeon Jae text Raffles Bulletin of Zoology 2018 2018-11-15 66 664 703 journal article 10.5281/zenodo.5360916 2345-7600 5360916 5AC21789-E1C1-4B48-813D-667D7638893C Macrostemum fastosum Walker, 1852 ( Figs. 90–94 ) Macrostemum fastosum Walker, 1852: 76 [ 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 ). 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 ). In dorsal view, segment X divided at middle and pointed toward apex laterally ( Fig. 92 ). 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 ). However, we observed that specimens from Vietnam have thicker brown stripes on forewings. Other diagnostic characters are illustrated in Figs. 91–94 .