Rhorus orientalis (Cameron, 1909)

Reshchikov, Alexey, Choi, Jin-Kyung, Xu, Zai-fu & Pang, Hong, 2017, Two new species of the genus Rhorus Foerster, 1869 from Thailand (Hymenoptera, Ichneumonidae), Journal of Hymenoptera Research 54, pp. 79-92 : 87-88

Rhorus orientalis (Cameron, 1909) Figs 20-28

Monoblastus orientalis Cameron, 1909: 727. By original designation.

Rhorus cameroni Townes, 1970: 1-307 (replacement name for Rhorus nigra (Cameron). Synonymized by Gupta (1987).

Material examined.

Holotype, female, INDIA: Himachal Pradesh, Simla , ix.1898, leg. C.G. Nurse (BMNH).

Diagnosis.

This species differs from other Oriental species by combination of the following characteristics: upper area of face with two yellow spots (Fig. 21 ); lobe of oral carina behind mandibles weakly defined and slightly elevated behind mandibles (Fig. 20 ); areolet petiolate; costula absent; T1 1.9 × as long as apical width; metasoma reddish-brown except for T1 and most of T2 black (Fig. 20 ).

Redescription.

Female (holotype) (Fig. 21 ). Body length 6.5 mm. Fore wing length 5.6 mm. Flagellum with 36 flagellomeres, longer than fore wing; two basal flagellomeres 0.9 × as long as maximum diameter of eye; first flagellomere 4.2 × as long as apical width. Head not narrowed posteriorly; temple length in middle 0.75 ×transverse diameter of eye; cheek convex below eye; temples granulate, with setae. Face widened ventrally, without central bulge; face coarsely and densely punctate; average distance between punctures 0.5 × their diameter (Fig. 22 ). Frons with finer and sparser punctures than those on face. Clypeus distinctly separated from face by depression, coarsely and densely punctate; its lower margin truncate, with a comb of setae. Malar space 0.5 × as long as basal width of mandible. Upper tooth of mandible as long as lower one; mandible smooth, not swollen before base, with a defined transverse depression at its base. Oral carina weakly defined and slightly elevated behind mandibles.

Pronotum corasely and densely punctate, with distinct epomia. Mesoscutum moderately punctate, with shallow notauli. Mesopleuron (except for speculum) finely and densely punctate; speculum large, covering about 0.75 × length of mesopleuron, polished part below mesopleural pit extending to hind corner of mesopleuron. Mes oscutellum convex in lateral view and finely punctate. Metapleuron finely and densely punctate. Propodeum smooth, shining, with long, dense white setae; costula absent; areola absent; basal area and areola combined. Pterostigma 4.1 × as long as broad. Fore wing with cu-a postfurcal. Hind wing with vestigial Cu1 intercepted below middle. Fore claw with 7 teeth. Hind femur 3.9 × as long as broad. Hind claws missing.

T1 1.9 × as long as apical width; its longitudinal carinae extending to 0.6 × its length; space between carinae smooth with shallow punctures; dorso-lateral carinae defined, up to apical 0.6. T2 evenly, finely punctate (Fig. 25 ); average distance between punctures 0.5-2.0 × their diameter. Ovipositor slightly upcurved (Figs 27 , 28 ).

Color. Head black. Upper part of face with two yellow spots (Fig. 22 ). Antenna with scape and flagellum brown. Mandible brown, with teeth reddish-brown. Mesosoma black. Tegula and subtegular ridge of mesopleuron dark reddish-brown. Legs brown to dark brown, with fore and mid coxae and femora dark reddish-brown. Metasoma yellowish-brown, with T1 and T2 predominantly black but slightly reddish-brown posteriorly (Fig. 25 ). Ovipositor sheath yellowish-brown (Fig. 28 ).

Male. Unknown.

Distribution.

India.

Figures

Figures 20 - 28. Rhorus orientalis (Cameron, 1909), female holotype. 20 Labels 21 Habitus in lateral view 22 Head in anterior view 23 Head in dorsal view 24 Head in lateral view 25 T 1 and T 2 in dorsal view 26 Metanotum and propodeum in dorsal view 27 Metasoma in lateral view 28. Apex of metasoma in lateral view. Scale bars: 21: 2 mm; 22 - 25, 27, 28: 0.5 mm; 26: 1 mm.