Woldstedtius takagii (Uchida, 1957)

Morishita, Shunsuke & Watanabe, Kyohei, 2022, Revision of the genus Woldstedtius Carlson, 1979 (Hymenoptera, Ichneumonidae, Diplazontinae) from Japan, Deutsche Entomologische Zeitschrift 69 (1), pp. 45-64 : 45

Woldstedtius takagii (Uchida, 1957)

Figs 7A-D , 9C, D, K

Homocidus yokohamensis var. takagii Uchida, 1957: 251

Materials examined.

Type series: JAPAN: [Hokkaido] 1 F (holotype), Hokkaido, Sapporo , 15 Jul 1955, S. Takagi leg. (SEHU). Non-types : JAPAN: [Honshu] 1 F, Yamanashi Pref., Koshu City, Mt. Daibosatsu, Kaminikkawa-toge , 16 Jun 2007, K. Watanabe leg. ( KPMNH); 1 F, Toyama Pref., Nanto City, Togamura, Kamimomose, 25 Aug-1 Sep 2009, M. Watanabe leg. (MT) ( KPMNH) .

Description.

Female (n = 3). Body length 7.7-7.9 mm, polished, coriaceous, covered with silver setae.

Head 0.47-0.52 × as long as wide. Clypeus 1.78-2.0 × as broad as high, convex basally in lateral view. Face 2.6-2.9 × as broad as high, densely punctate, convex medially in lateral view, separated from clypeus by shallow clypeal sulcus. Inner orbits strongly divergent downward (Figs 7B , 9C ). Length of malar space 1.0-1.1 × as long as basal mandibular width. POL 2.0-2.15 × as long as OD. OOL 1.05-1.25 × as long as OD. POL 1.8-1.9 × as long as OOL. Antenna with 25-26 flagellomeres. FL I 1.2-1.33 × as long as FL II. MP IV 1.25-1.4 × as long as MP V.

Mesosoma. Lateral aspect of pronotum strigose anteriorly. Mesoscutum finely and densely punctate (separated by ca. 0.8-1.0 × their diameter) (Fig. 7C ). Scutellum finely and densely punctate (separated by ca. 0.8-1.0 × their diameter) (Fig. 7C ). Mesopleuron coarsely and densely punctate except for the areas on and below speculum. Sternaulus weakly impressed. Propodeum weakly protruded basal 0.2 in lateral view (Fig. 9D ), rugulose (Fig. 7D ), without carinae except for pleural carina. Fore wing length 6.5-7.4 mm. Nervellus intercepted below middle. Hind femur 4.2-4.3 × as long as maximum depth in lateral view. Hind tibia 7.5 × as long as maximum depth in lateral view. Ratio of length of hind first to fifth tarsomeres 1.0: 0.6-0.7: 0.4: 0.2-0.3: 0.3.

Metasoma. T I nearly square in dorsal view (Fig. 9K ), 0.95-1.05 × as long as maximum width, rugulose laterally. Latero-median carina present basal ca. 0.5 of T I (Fig. 9K ). T II 0.65-0.75 × as long as maximum width, striate anteriorly.

Coloration (Fig. 7A-D ). Body (excluding wings and legs) black. Face with a large yellow spot medially (this spot sometimes obscured). Palpi, tegula and mesepisternum yellow (mesepisternum sometimes darkened ventrally). Mandible yellow except for apex and base. Lateral aspect of pronotum with a yellow spot posteriorly. Scutellum with a yellow spot apically. Subtegular ridge often tinged with yellow. Wings hyaline. Veins and pterostigma blackish-brown except for yellowish-brown wing base. Legs yellow to brown. Fore and mid trochanters often tinged with black. Coxae, hind trochanter, hind tibia and hind tarsomeres black. Hind trochantellus and femur reddish-brown to blackish-brown. Base of hind tibia tinged with white.

Male. Unknown.

Distribution.

Japan (Hokkaido and Honshu).

Bionomics.

Host unknown. Adults were collected in broad-leaved forests of mountainous regions.

Remarks.

This species resembles W. kuroashii , but can be distinguished from the latter by the following combination of character states in females: inner orbits divergent downward (almost parallel in W. kuroashii ); propodeum weakly protruded basal 0.2 in lateral view (rounded in W. kuroashii ); yellow shoulder marks of mesoscutum absent (present in W. kuroashii ).

Figures

Figure 7. Woldstedtius takagii (Uchida, 1957) (A-D. female) - A. Habitus; B. Head, frontal view; C. Mesonotum, dorsal view; D. Propodeum, dorsal view.

Figure 9. Japanese Woldstedtius A, G. W. f. flavolineatus (Gravenhorst, 1829); B, I. W. kuroashii (Uchida, 1957); C, D, K. W. takagii (Uchida, 1957); E. W. alpicola sp. nov.; F. W. biguttatus (Gravenhorst, 1829); H. W. karafutensis (Uchida, 1957); J. W. punctatus sp. nov. (E, J. holotype; B, I. paratype) - A, B. head, lateral view; C. head, frontal view; D. propodeum, lateral view; E-K. T I, dorsal view.