Rhorus Foerster , 1869

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 : 80-81

Rhorus Foerster, 1869

Rhorus Förster, 1869: 195. Type species: Tryphon mesoxanthus Gravenhorst, 1829. Included by Woldstedt (1877: 455). Monobasic.

Dolichoblastus Strobl, 1903: 52. Type species: Monoblastus (Dolichoblastus) flavopictus Strobl. Monobasic. Synonymized by Townes (1945: 485).

Cyphanza Cameron, 1909: 723. Type species: Cyphanzia nigra Cameron ( nigra preoccupied in Rhorus by Ashmead, 1902 = cameroni Townes, 1970). Monobasic. Synonymized by Townes (1945: 485).

Notes.

The genus Rhorus can be distinguished from other genera of Ctenopelmatinae by the following characteristic combination: no suture between face and clypeus; mandible with subbasal convexity; fore wing with an areolet; nervulus usually postfurcal; nervellus inclivous, broken below middle; base of propodeum with U-shaped emargination; ovipositor sheaths semi-cylindrical (their rounded apices bear a hairy membranous depression dorsally); ovipositor slender, lacking a notch.

Key to the Oriental species of Rhorus

1	Lower mandible tooth distinctly longer than upper one (Fig. 12 ); lobe of oral carina distinctly defined and strongly elevated behind mandible (Fig. 19 ); costula present (Fig. 13 ); T1 rather elongate, 3.5 × as long as apical width; face in male entirely yellowish. Only male is known	Rhorus lannae Reshchikov & Xu, sp. n.
-	Lower mandible tooth as long as or slightly longer than upper one; lobe of oral carina weakly defined and weakly elevated behind mandible (Fig. 4 ); costula absent; T1 less elongate, 1.5-1.9 × as long as apical width; face black with yellow marks medially (Fig. 3 )	2
2	Face with strong central bulge (Fig. 4 ); T1 1.5 × as long as apical width; ovipositor slightly downcurved (Fig. 2 ); metasoma reddish-brown except anterior part of T1 (Fig. 7 ); face in female with a pentagonal yellow mark (Fig. 3 ). Only female is known	Rhorus inthanonensis Reshchikov & Xu, sp. n.
-	Face without central bulge (Fig. 22 ); T1 1.9 × as long as apical width; ovipositor slightly upcurved (Fig. 28 ); metasoma reddish-brown except for T1 and most of T2 black (Fig. 20 ); upper part of face in female with two yellow spots (Fig. 22 ). Only female is known	Rhorus orientalis (Cameron)

Figures

Figure 2. Rhorus inthanonensis Reshchikov & Xu, sp. n., female holotype, habitus in lateral view.

Figures 12 - 19. Rhorus lannae Reshchikov & Xu, sp. n., male paratype. 12 Head in frontal view 13 Propodeum in dorsal view 14 Mesosoma in dorsal view 15 Head in dorsal view 16 Metasoma in lateral view 17 Metasoma in dorsal view 18 Wings 19 Head and mesosoma in lateral view.

Figures 3 - 7. Rhorus inthanonensis Reshchikov & Xu, sp. n. female holotype. 3 Head in frontal view 4 Head in lateral view 5 Head in dorsal view 6 Mesopleuron and metapleuron 7 Metasoma in dorsal view.

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.