A review of the gall midges (Diptera: Cecidomyiidae) of Indonesia: taxonomy, biology and adult key to genera Author Kolesik, Peter 0000-0001-5569-6330 pkolesik@outlook.com.au Author Gagné, Raymond J. 0000-0001-5569-6330 pkolesik@outlook.com.au text Zootaxa 2020 2020-09-07 4847 1 1 82 journal article 8617 10.11646/zootaxa.4847.1.1 8498d050-113a-4658-9b4c-db8087b12c81 1175-5326 4406856 1F8E3DED-6EA9-4D8A-8DA9-CD8C0CC9147F Oligoxenomyia radicis Felt [ Figs 25 a–n] Oligoxenomyia radicis Felt, 1927b: 386 . Material examined . Syntypes : 6 males , 10 females , 2 pupae reared from aerial root galls on Freycinetia sumatrana Hemsl. (as F. valida Ridl. ) ( Pandanaceae ), gall No 45 in DvLR & DvL (1926) collected at Bolang , near Bogor , Java , iii-1924 . Felt #a3391). Felt’s types are mounted on 4 slides, all uncleared, whole specimens, adults in lateral position, pupae in dorso-ventral. All characters preserved in at least one specimen . Description . Adult . Palpal segments 3, segments progressively longer [ Figs 25g , h ]. Tarsal claws bent at right angle close to basal third, tip pointed, bowed, empodia reaching bend of claw [ Fig. 25f ]. Male . Wing length 2.7 mm (2.5–2.9), width 1.0 mm (0.9–1.2) [ Fig. 25a ]. Flagellomeres [ Fig. 25b ]. Terminalia [ Figs 25 c–e]. Female . Wing length 3.5 mm (3.3–3.7), width 1.4 mm (1.3–1.4). Flagellomeres slightly constricted at midlength [ Fig. 25i ]. Terminalia [ Figs 25j, k ]. Pupa . Antennal horns long, narrow, broadly rounded in ventral view [ Fig. 25l ]. Prothoracic spiracle long, tapered, bowed at distal third, with small spikes distally, trachea ending below distal end [ Fig. 25m ]; spiracles on abdominal segments sessile. Abdominal segments dorsally with dense field of large, simple spikes. Larva unknown. Biology . This species causes an aerial root gall on Freycinetia sumatrana Hemsl. (Pandanaceae) described by DvLR & DvL (1926, gall No 45, Fig 24 . [ Fig. 25n ]). Irregular swellings are partly coalescent and attached to the root with broad bases. The surface is covered with numerous short, brown hair-like scales. The interior contains many long and tubular larval chambers, crossing the longitudinal axis of the root. Geographical distribution . This species is known from Java : Mt Ciampea , near Bogor , alt. 200 m , 1920; Mt Burangrang , alt. 1100 m , vii-1921 ; Bolang, near Bogor, alt. 950 m , iii-1924 (DvLR & DvL 1926) .