Mastrus molestae
Creators: name: Watanabe, Kyohei
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Ichneumonidae
Mastrus
Mastrus molestae

description: Mastrus molestae (Uchida, 1933)
(SJN: Kuro-chibi-togari-himebachi)
(Figs 48A–D, 65R, 66R)
Hemiteles (Isadelphus) molestae Uchida, 1933b: 158.
Description. Female (n=2). Body length 6.0–7.0 mm. Body polished, covered with silver setae.
Head coriaceous. Clypeus 2.2 times as wide as maximum length, sparsely punctate dorsally, smooth ventrally and medially, its anterior margin rounded and with a pair of small tubercles. Face densely punctate (Fig. 65B). MSL 0.8 times as long as BWM. Frons, gena, and vertex punctate. OOL slightly shorter than POL. OOL and POL longer than OD. Occipital carina complete, its lower end joined with hypostomal carina distant from mandibular base. Upper tooth of mandible almost as long as lower tooth. Base of mandible flat. Antenna with 21 flagellomeres, subapical part not widened. FL III 5.0–5.7 times as long as maximum depth in lateral view.
Mesosoma. Upper side of collar without a median carina. Lateral part of pronotum punctate dorsally, smooth with some rugae ventrally. Epomia present. Mesoscutum matt, finely and densely punctate. Notaulus distinct, fading our near center of mesoscutum. Scutellum punctate, without a lateral longitudinal carina except for base. Mesopleuron punctate except for smooth area of speculum and its adjacent areas. Posterior transverse carina of mesosternum complete. Metapleuron punctate, with a complete juxtacoxal carina. Propodeal carinae and areas complete (Fig. 65R). Postero-lateral corner of area dentipara weakly projected. Area superomedia as long as wide, receiving lateral section of anterior transverse carina just behind of middle (Fig. 65R). Length of fore wing 5.0 mm. Areolet absent (Fig. 65D). Nervellus inclivous, intercepted posteriorly. Hind femur 4.0 times as long as maximum depth in lateral view. Hind TS I: II: III: IV: V = 2.0: 0.9: 0.5: 0.3: 0.5. Tarsal claws simple.
Metasoma. T I 1.3–1.4 times as long as maximum width, coriaceous, with some longitudinal striae posteriorly. Median dorsal carina of T I present except for posterior part. Dorsolateral carina of T I complete. T II granulate with punctures and minute, irregular rugae except for smooth posterior margin (Fig. 65C). T II to T VII wider than long. T III granulate with punctures and minute, irregular rugae except for smooth posterior half. T IV to T VIII finely and sparsely punctate. T VII and T VIII weakly elongated. Ovipositor sheath 1.6–1.7 times as long as hind tibia. Ovipositor straight, weakly compress laterally, with a weak nodus and ventral teeth.
Coloration (Figs 48A–D). Body (excluding wings and legs) black to blackish brown. Basal spot of mandible and palpi whitish yellow. Ventral areas of scape and pedicel reddish brown. Tegula and membranous part of mesosternum whitish yellow. Posterior margins of T II and T III narrowly tinged with reddish yellow. Posterior margins of T IV to T VII tinged with whitish yellow. Ovipositor reddish brown. Wings hyaline. Veins and pterostigma brown to blackish brown except for yellowish brown base of pterostigma. Legs reddish brown. Trochanters, trochantelli, tibial spurs, apex of hind femur, and base of tibiae yellow to yellowish brown. TS V, apical part of hind femur, and hind tibia dark brown to blackish brown. Mid tibia sometimes partly darkened.
Male. Not studied in this study.
Materials examined. JAPAN: SEHU (holotype), F, Nagano Pref., Kamisuwa, 25. III. 1932, reared from G. molesta, G. J. Haeussler leg.; KPM-NK 81987, F, Nagano Pref., Outaki Vil., Mt. Ontakesan, Hakkaisan, 4. VIII. 2017, K. Watanabe leg.
Distribution. Japan (Honshu).
Bionomics. Host record: Grapholita molesta (Busck, 1916) (Lepidoptera, Tortricidae) (Uchida, 1933).
description: Published as part of Watanabe, Kyohei, 2021, Taxonomic and Zoogeographic Study of the Japanese Phygadeuontinae (Hymenoptera, Ichneumonidae), with Descriptions of 17 New Species, pp. 55-136 in Bulletin of the Kanagawa Prefectural Museum (Natural Science) 50 on pages 111-112, DOI: 10.32225/bkpmnh.2021.50_55, http://zenodo.org/record/12774639