Eridolius, Forster, 1869

Reshchikov, Alexey, 2018, Review of the genus Eridolius Förster from the Oriental Region (Hymenoptera, Ichneumonidae, Tryphoninae), Zootaxa 4377 (3), pp. 431-443 : 432

Key to Oriental species of the genus Eridolius

1. Metasoma beyond T1 reddish (figs 5, 10, 11, 13, 17).......................................................... 2

- Metasoma entirely black or black with yellow posterior margins of T1 to T7 ( Figs 18, 22 , 29 , 31, 34 )................... 3

2. Upper mandibular tooth longer than lower one ( Fig. 15 ). Malar space 0.5 × as long as basal width of mandible. Face yellow ( Fig. 15 ). Middle and hind coxae, and hind femur black ( Fig. 17 )........................... E. aithogaster Gupta, 1991

- Lower mandibular tooth longer than upper one ( Fig. 3 ). Malar space 0.3 × as long as basal width of mandible. Face black ( Fig. 1 ). Coxae and hind femur reddish (fig. 5)............................................. E. xui Reshchikov , sp. nov.

3. Body entirely black (figs 30–34).......................................................... E. niger Gupta, 1991

- Body mostly black, with yellow colouration (clypeus, mandibles, most of legs and hind margin of T2-7) ( Figs 18–29 )...... 4

4. Lower mandibular tooth just slightly longer than upper one ( Fig. 27 )............................................. 5

- Lower mandibular tooth distinctly longer than upper one ( Fig. 20 )............................................... 6

5. Fore and middle coxae and all trochanters yellow, hind legs reddish except hind tibia, tarsus and apical part of femur brown ( Fig. 29 ). T1 without flanges at glymmas............................................ E. kambaiti Kasparyan, 1998

- All coxae and hind legs entirely black. T1 with weak flanges over glymmas..................... E. sinensis Gupta, 1993

6. Face and lower part of mesopleuron densely and distinctly punctate. Inter-ocellar distance 0.7 × ocellocular distance. Fore and middle coxae and trochanters yellowish-brown......................................... E. clauseni (Kerrich, 1962)

- Face and lower part of mesopleuron sparsely and shallowly punctate ( Fig. 20 ). Inter-ocellar distance 0.5 – 0.56 × ocellocular distance. Fore and middle coxae and trochanters whitish-yellow (fig. 22)......................... E. guptai Gupta, 1991

Figures

FIGURES18–22.Eridolius guptai Gupta,1991, holotypefemale.18. Metasomain dorsalview, 19.Propodeum indorsal view, 20. Face, 21. Wings, 22. Habitus lateral view.

FIGURES26–29. Eridolius kambaiti Kasparyan, 1998, holotype female.26.Head and mesosomain dorsal view, 27. Face, 28. Propodeum in dorsal view, 29. Habitus lateral view.

FIGURES 30–34. Eridolius niger Gupta, 1991, holotype female. 30. T1, 31. Metasoma in dorsal view, 32. Face, 33. Wings, 34. Habitus lateral view.

FIGURES13–17. Eridolius aithogaster Gupta, 1991, holotypefemale.13.Propodeum and metasoma in dorsal view, 14.Head and mesosoma in dorsal view, 15. Face, 16. Wings, 17. Habitus in lateral view.

FIGURES 1–5. Eridolius xui Reshchikov, sp. nov. holotype female. 1. Face, 2. Head in dorsal view, 3. Mandible, 4. Wings, 5. Habitus lateral view.

FIGURES 23–25. Eridolius guptai Gupta, 1991, holotype female. 23. Metasoma in lateral view, 24. Head and mesosoma in dorsal view, 25. Mesosoma in lateral view.