Matskási István (szerk.): A Magyar Természettudományi Múzeum évkönyve 99. (Budapest 2007)

Papp, L.: A review of the Old World Trigonometopini Becker (Diptera: Lauxaniidae)

Proclinate frontal setulae emerge back to anterior ocellus. No true ocellars, postocellar setae 0.27 mm, cruciate. Antenna dark. Light dorsocentral lines broader than in L. sasakawai. Scutellum with sagittal light area diffuse and not widening posteriorad. Wing (Fig. 66) almost evenly dark, cross-veins slightly more darker (brown) bordered. Veins light brown. Stronger costal fringe of 5 black setulae on section distally to R2+3. Intracrossvein section of vein M 0.57 mm, terminal section 1.055 mm, ratio 1.86. Tibiae and tarsi yellow, 2 apical tarsomeres of fore tarsi black. Femora brownish grey. Male genitalia (Figs 7-10) rather large (please be aware of scales). Epandrium with an extremely large dorso-caudal pair of processes (Figs 8-9). Epandrium rather long, including its base (Fig. 8), epandrial setae thick and long (Figs 8-9). Anus almost dorsal (!). Cerci small, setae concentrated on apical part. Gonites (Figs 7-8) of a very intricate form: with a dorsal and a ventral pair of caudal processes, ventral part with two small lobes. Phallapodeme (Figs 7, 10) very small but rather high in lateral view. Ejaculatory apodeme medium-long, apical processes comparatively long and broad (Fig. 10). Remarks - Among the known species of Trigonometopini Tetroxyrhina forficula (SHATALKIN, 1997) has the largest dorso-caudal processes on epandrium. The name of the new species refers to that character and species. Luzonomyza sasakawai sp. n. (Fig. 74) Type material- Holotype male (HNHM, pinned on a No. 1 pin): "Vietnam, Cue phuong, Ninh binh, 6-18.V.1966, leg. Topái". Paratype female (HNHM, right wing damaged, glued under the specimen): Thailand, Prachuap Khiri Khan Prov., 25 km S. of Ban Noghin, No. 3, secondary forest, 19. 11. 2003, OROSZ & SZIRÁKI. Description - Measurements in mm: body length 5.57 (holotype), 4.40 (paratype), wing length 4.78 (holotype), 3.96 (paratype), wing width 1.65, 1.41. Facial keel low and short, almost indistinct (Fig. 74). Contrary to L. vietnamensis, basic colour of face, cheeks and genae yellow with a greyish brown genal spot widening posteriorad. Frons greyish yellow, medial stripe narrow, borders diffuse. Ocellar setae thin and very short, postocellars long and cruciate. Antenna all yellow. Thoracic colour similar to that of L. vietnamensis. In contrast to L. vietnamensis, medial stripe of scutellum narrow to the margin, but lateral light margins broader. Wing with broad brown radial area, apical part of wing only slightly darker than basic colour, both cross-veins brown-bordered. Veins brown. Tibiae and tarsi yellow but tarsomeres 3-5 of fore tarsi black. Male fore basitarsus with a fringe of dense black setulae posteriorly. Male hind basitarsus both anteriorly and posteriorly with fringes of black setulae in whole length, anterior one widens to a longish patch distally. Abdomen darker greyish brown, ventrally curved parts of terga yellowish. Abdominal setae not long. A diffuse yellow sagittal stripe of tergites present. Tergite 6 with a medial yellow triangle on its proximal 3/4. Male epandrium without a pair of dorso-caudal appendages. Female. Not only tarsomeres 3-5 but also fore tarsomere 2 dark. Dark genal spot smaller. Fore and hind basitarsal fringes of shorter setulae, which are not black, consequently less conspicuous. Abdomen without the medial light stripe on tergites.