2.3 Colocasiomyia sabahana species complex, new Diagnosis. Cibarial, posterior sensilla absent (ch.6-1; Fig. 4C). Phallal sheath gently curved dorsad and slightly projected triangularly at dorsobasal corner in lateral view (ch.40-2, 41-1; Figs 11F, 24I). Shared characters. Supracervical setae approximately 4 per side, distally more or less curved, longer than inner occipital setae. Anterior reclinate orbital seta small, situated behind proclinate orbital seta; additional, interfrontal setulae on fronto-orbital plate present (ch.2-0). Eye with stout, dense interfacetal setulae (ch.3-1). Distance between antennal sockets wider than half of socket width (ch.4-0). Cibarial, medial sensilla 3–4 per side, in parallel rows narrower than sensilla campaniformia (ch.5-2; Fig. 4C). Anterior dorsocentral setae behind transverse suture (ch.7- 0). Prescutellar acrostichal setae absent (ch.8-1); acrostichal setulae in 4 rows (ch.9-0). Katepisternal setae small, shorter than postpronotal setae (ch.10-1). Apical scutellar setae nearer to each other than to basal scutellar seta. Costal setae in middle row all weak, trichoid (ch.12-2). Patch covered with only minute pubescence absent on anterodorsal portion of fore tarsomere I (ch.13-1). Male abdominal sternites III–V wider than long (ch.16,17,18-0); V medially concaved on posterior margin. Female abdominal sternite III as long as wide (ch.19-0); V longer than wide (ch.21-1). Male abdominal sternite VI not pubescent at least partly, with a pair of divergent processes longer than 0.1 mm, widely separated from each other, bearing prominent seta on apex and small setae on submedial to distal portion (ch.23,25-0, 24,26,27-1; Fig. 9L,M). Epandrium pubescent except for anterior to ventral margin and anteroventral elongation; setae on posteroventral portion as thick as cercal setae (ch.32-0); phragma small (narrower than epandrial anteroventral corner) expansion on antero-subapical margin (ch.33-2). Surstylus vestigial, very narrow process, apically with 1 or 2 tiny, trichoid seta(e) ...