Diphyus rufofacialis, Riedel, 2019

Riedel, Matthias, 2019, Contribution to the Ichneumoninae (Hymenoptera, Ichneumonidae) of Nepal, Linzer biologische Beiträge 51 (2), pp. 1119-1162 : 1132-1133

Diphyus rufofacialis nov.sp. ( figs 21-23 )

Holotype: ♀ " Westnepal , Distr. Bajura Simikot, 19 km W Kuwdi Khola 3500 m, 29°53´14´´N 81°38´40´´ E, 05.VII.2001, leg. Creutzburg " ( SDEI).

D e s c r i p t i o n: ♀: Body length 13 mm. Flagellum bristle-shaped, with 39 flagellomeres; 1 st flagellomere 3.1x longer than wide, widest flagellomeres about square. Head with fine brownish hairs. Temple moderately and almost linearly narrowed behind eye, dorsally c. 0.7x as long as eye. Distance of lateral ocellus to eye 1.2x ocellar diameter. Occiput and frons transversely striate, frons smooth ventrally. Face coarsely rugosepunctate. Clypeus densely punctate, with sharp and straight apical margin. Gena wider than eye, with dense punctures. Malar space long, 1.5x longer than width of mandibular base. Mandible with two teeth, lower tooth smaller than upper one. Genal carina reaching hypostomal carina away from mandibular base; hypostomal carina slightly elevated.

Mesosoma covered with fine brownish hairs. Notaulus slightly impressed at frontal margin of mesoscutum. Mesoscutum densely rugose-punctate, ± matte. Mesopleuron and metapleuron coarsely rugose-punctate; speculum punctate and shining. Juxtacoxal carina present. Scutellum slightly convex, as long as wide, without lateral carina, densely punctate. Area superomedia hexagonal, slightly longer than wide (1.1x), rugose; costula absent. Area petiolaris rugose, with lateral carina. Outer dentiparal edge with short, blunt tooth. Hind coxa densely punctate, without scopa. Hind femur 5.1x longer than wide,

densely punctate. Claws not pectinate. Areolet pentagonal, frontal distance of intercubiti c. 2x their width; 2nd recurrent vein

reaching areolet in its middle. Nervulus postfurcal (3x its width).

Metasoma strongly amblypygous. Postpetiole moderately widened, without distinct dorsal carina; lateral field 0.35x as wide as median one, with some superficial rugae; median field moderately elevated, with few fine striae and punctures, largely smooth and shining. Gastrocoelus quadrangularly impressed and with fine longitudinal striae. Thyridium short, transverse, c. 0.5x as wide as the interval. 2 nd tergite 1.2x wider than long, with superficial fine punctures and fine granulation, but shining. Following tergites with fine superficial granulation, strongly shining. 2 nd sternite with weak median fold. Ovipositor sheath not extending behind metasomal apex.

Colour: Black. Flagellomeres 9-13 with ivory stripes. Clypeus, face, malar space, ventral gena, frontal orbit, scape ventrally, collare and upper margin of pronotum, tegula and subtegular ridge dark red. Scutellum yellow. Metasoma black; 6 th tergite with smaller, 7 th tergite with larger roundish yellow spot medially. Coxae, trochanters and femora black; femora narrowly red basally and apically; tibiae and tarsi reddish. Wings with yellowish infuscation; pterostigma yellowish.

♂ unknown.

R e m a r k: This new taxon also resembles Diphyus fuscatorius (HEINRICH) from Myanmar, but differs by its completely black tergites with yellow spots on 6 th and 7 th tergites and the almost smooth median field of postpetiolus.

Figures

Figs 21-23: Diphyus rufofacialis nov.sp. ♀: (21) habitus from dorsal, (22) face, (23) head from dorsal. Figs 24-25: Mesopleura of: (24) Pseudoamblyteles genator nov.sp. ♀, (25) Pseudoamblyteles nepalensis nov.sp. ♀.