Megalomya rufator, 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 : 186

Megalomya rufator nov.sp. (figs 2, 7, 11, 13, 15, 17)

T y p e m a t e r i a l: Holotype: ♀ ̎ Lao, Hua Phan Prov., Phon-Pan , Umg. Ort Ban Saleui,

20°13́30́́N 103°59́26́́E, 1350-1900 m MSL, 28.04.2012 KJa, leg. C. Holzschuh & natives̎

(Linz). D e s c r i p t i o n: ♀. Body length 26 mm. Flagellum with 34 flagellomeres, stout; 1st

flagellomere about square; following flagellomeres (except the apical ones) wider than long, widest ones about 1.3x wider than long. Temples moderately and linearly narrowed behind eyes, not punctate, about 0.7x as long as eye ( fig. 11 ). Occipital carina narrow medially, ± lamelliform laterally and ventrally. Frons strongly impressed centrally, smooth, with a strong triangular median lamella. Face and clypeus densely punctate. Clypeus c.3.1x wider than long, apical margin moderately concave. Labrum exposed, with rounded apical margin. Mandibles strongly swollen, lower teeth larger than upper ones.

Sides of pronotum largely smooth, with few fine punctures at upper margin, pronotal groove with some coarse transversal ridges in dorsal half, epomia absent. Mesoscutum smooth and shining, with fine scattered punctures; notauli impressed in frontal 0.35 of mesoscutum. Subtegular ridges swollen in anterior half (fig. 13). Mesopleura with scattered and partly superficial punctures, specula smooth (fig. 13). Metapleura with scattered punctures, partly rugose in ventral 1/4. Scutellum flat, longer than wide, with very scattered fine punctures and without lateral carinae. Propodeum largely smooth, with basomedian tubercle and moderate median impression and some paramedian transversal rugae. Apical transversal carina ± developed. Femora stout; fore femora 2.8x, mid femora 3.0x and hind femora 3.6x longer than wide.

Areolet pentagonal, 2 nd recurrent vein in its distal 0.7. Nervulus strongly postfurcal (by 0.5x its length). Nervellus of hind wing intercepted at apical 0.6.

Metasoma rather slender, smooth and shining. 1 st tergite 2.1x longer than wide, with few scattered punctures. 2 nd tergite 1.33x longer than wide, 3 rd tergite 1.2x longer than wide; tergites smooth, with few fine punctures.

Color: Reddish. Flagellum yellowish, narrowly darkened at apex. Mandibles brown. Yellowish are clypeus, face, frontal orbits, paramedian stripes on frontal mesoscutum, spot on tegulae, subtegular ridges, scutellum and postscutellum. Collare, hind margin of mesopleura and basal and apical margins of propodeum blackish. Wings slightly infuscate, darker at frontal margin of fore wing; pterostigma black, brownish centrally.

♂ unknown.

Remark: This new species also runs to M. townesi HE and M. rufator nov.sp. in the key of known females ( HE 1991). It differs from M. townesi by the completely red metasoma, densely punctate clypeus, fine and scattered punctation on mesoscutum, yellow spots on mesoscutum medially to notauli, yellow subtegular ridges, scutellum and postscutel- lum, and the dark pterostigma. It can be differentiated from M. nigrolineatus nov.sp. by stouter flagella, scattered and superficial punctuation of mesopleura, swollen subtegular ridges, and yellow spots on subtegular ridges and scutellum.

Figures

Figs 11-12: Head dorsally: (11) Megalomya rufator nov.sp. ♀; (12) Megalomya nigrolineatus nov.sp. ♀. Figs 13-14: Mesopleuron: (13) Megalomya rufator nov.sp. ♀; (14) Megalomya nigrolineatus nov.sp. ♀. Figs 15-16: Propodeum dorsally: (15) Megalomya rufator nov.sp. ♀; (16) Megalomya nigrolineatus nov.sp. ♀.