Megalomya melanogaster, Riedel, 2019

Riedel, Matthias, 2019, Four new species of the genus Megalomya UCHIDA (Hymenoptera, Ichneumonidae, Alomyinae) Irom Laos, Linzer biologische Beiträge 51 (1), pp. 179-187 : 181-184

Megalomya melanogaster nov.sp. (figs 3, 6, 10)

T y p e m a t e r i a l: Holotype: ♂ ̎ Laos, Hua Phan Prov., Ban Saleui , Phon-Pan-Mt., 20°13́30́́N 103°59́26́́E, 1350-1900 m, 04.05.2011, leg. C. Holzschuh & natives̎ (Linz).

D e s c r i p t i o n: ♂. Body length 18 mm. Flagellum with 35 flagellomeres, almost filiform; all flagellomeres distinctly longer than wide. Temples strongly and linearly narrowed behind eyes, smooth with very scattered fine punctures. Occipital carina complete and slightly lamelliform. Frons strongly impressed centrally, with fine longitudinal median ridge (fig. 3). Face and clypeus with coarse punctures. Inner eye margins slightly divergent ventrally. Apical margin of clypeus straight. Labrum exposed, with rounded apical margin ( fig. 6 ).

Sides of pronotum smooth, with scattered fine setiferous punctures in dorsal fourth, epomia present. Notauli strongly impressed in frontal 0.5 of mesoscutum. Mesoscutum smooth and shining, with scattered punctures. Subtegular ridges swollen and bulging frontally, sharp in caudal half. Mesopleura with rather dense fine punctures, specula smooth. Metapleura completely rugose. Scuto-scutellar groove narrow, arc-shaped. Scutellum flat, longer than wide, punctate, without lateral carina. Area basalis with strong median tubercle. Area externa smooth. Areae superomedia, dentipara and petiolaris with some coarse longitudinal rugae. Hind femur 5.1x longer than wide.

Areolet pentagonal, 2 nd recurrent vein reaching areolet at its distal 0.6. Nervulus slightly postfurcal (by 0.5x its width). Nervellus in hind wing intercepted at apical 0.6.

Metasoma slender, strongly shining. 1 st tergite 2.5x longer than wide, rugose-punctate. 2 nd tergite 1.5x longer than wide, rugose-punctate in basal third, almost smooth centrally, with scattered punctures in apical fourth. 3 rd tergite 1.25x longer than wide, densely punctate.

Color: Black. Ivory are palps, mandibles except teeth, labrum, clypeus, face, genae and malar spaces, frontal orbits, propleura, spot on tegulae, subtegular ridges and stripe on mesopleura. Tergites completely black. Fore and mid coxae and trochanters ivory. Fore and mid legs otherwise reddish. Hind legs including hind coxae black; hind trochanters ivory ventrally. Wings slightly infuscate; pterostigma black.

♀ unknown. R emark: This new species is characterized by the fine median ridge of the frons (without a median tooth-shaped or lamelliform extension as present in all other known Megalomya species), the completely black metasoma, slender 2 nd and 3 rd tergites and the characteristic color pattern.

Figures

Figs 5-8: Face frontally: (5) Megalomya albopunctatus nov.sp. ♂; (6) Megalomya melanogaster nov.sp. ♂; (7) Megalomya rufator nov.sp. ♀; (8) Megalomya nigrolineatus nov.sp. ♀. Figs 9-10: Head dorsally: (9) Megalomya albopunctatus nov.sp. ♂; (10) Megalomya melanogaster nov.sp. ♂.