Strongylophthalmyia macrocera L. PAPP, 2006

Papp, L., Merz, B. & Földvári, M., 2006, DIPTERA OF THAILAND A summary of the families and genera with references to the species representations, Acta Zoologica Academiae Scientiarum Hungaricae 52 (2), No. 2, pp. 97-269 : 168

Strongylophthalmyia macrocera L. PAPP , sp. n.

(Fig. 55)

Holotype male ( HNHM, left wing lost)): THAILAND: Ban Na Lae , nr Pua, over a rocky forest brook, Nov 5, 2004, No. 19, leg. L. PAPP & M. FÖLDVÁRI.

Measurements in mm: body length 3.15, wing length 2.93, wing breadth 1.20.

Thorax and abdomen shiny black, postpronotum and lateral part of antepronotum yellowish.

Frons and occiput shiny black, cheeks, genae and eye margin up to the level of antennal base covered by light grey microtrichia. Clypeus only 0.07 mm high. One pair of anterior lateroclinate and 3 pairs of reclinate and lateroclinate fronto-orbitals. Ocellars emerge much anterior to middle of frons, postocellars longer than ocellars (0.28 mm and 0.24 mm). Peristomials downcurved or reclinate (posterior ones). Cheek with similar setae ventrally (above genal edge). Pedicel and first flagellomere yellow, slightly grey fumose, scape darker. Long seta on pedicel 0.17 mm. Fist flagellomere extremely large (Fig. 55): 0.26 mm long, 0.34 mm broad, cilia 0.04 m. Arista thin, bare, 0.43 mm long. Palpus short black, simple.

Anepisternum with a dorsal caudal (marginal) seta and several setulae on caudal part. No oblique row of whitish setae on anepisterenum.

Legs yellow, mid and hind femora brown fumose. Fore femur dorsally convex, without any modification, or thick thorns.; ventromedially at basal Ľ with a medially directed long, thorn-like seta. Mid tibia without a true ventroapical but with a yellow anteroventral (0.185 mm) and a posteroventral (0.15 mm) apical seta each.

Wing clear, yellowish grey, veins ochre. Second costal section 1.03 mm, third section 0.89 mm. M vein sections: 0.34, 0.62 and 1.01 mm. Veins R 4+5 and M parallel. Base of R 2–5 fork with a 0.06 mm, light button-like thickening. Calyptral fringe black. Halter’s stalk grey, knob greyish (dirty) white.

Male cerci widely rounded apically, less than 0.2 mm long. Longest cercal seta 0.14 mm, lateral (i.e. not apical). Phallus 0.85 mm long (!), without strong thick thorns or lateral processes.

Female unknown.

Strongylophthalmyia macrocera sp. n. keys to S. coarctata HENDEL (Taiwan) in STEYSKAL’ s (1971) key, but they cannot be closely related. S. coarctata males have a long thick curved first flagellomeral process, their fore femur is without thick medioventral seta, and their R 2+3 vein is much longer (compared to R 4+5). The positions in FREY’ s and STEYSKAL’ s keys do not reflect relatedness. The light humeral area is not a synapomorphy, but the first flagellomeral process is most likely that. The new sp. does not belong to the S. crinita group either (palpus simple).