Virgichneumon hinzi, Riedel, 2024

Riedel, Matthias, 2024, The genus Virgichneumon HEINRICH in the West Palaearctic region (Hymenoptera, Ichneumonidae, Ichneumoninae), Linzer biologische Beiträge 56 (1), pp. 149-199 : 151-153

Key of the West Palaearctic species of Virgichneumon HEINRICH

(modified after RASNITSYN & SIYTAN 1981)

♀♀:

1 Metasoma black, apical tergites often with ivory spots (fig. 20). ........................................1

- At least 2 nd and 3 rd tergites red, apical tergites often with ivory spots (fig. 19).................13

2 Frontal orbit with large ivory spot dorsally covering about 1/3 of frontal width (fig. 76). Legs black. Mesosoma covered with brown setae. Flagellar ring, scutellum and spots on 6 th and 7 th tergites ivory. 12-14 mm ...................... V. albilineatus (GRAVENHORST, 1820)

- Frontal orbit at most with narrow ivory stripes. ..................................................................3

3 Flagellum filiform, preapical flagellar segment distinctly transverse and about as wide as 1 st segment (fig. 79). Mesosoma black. Metasoma black, 6 th and 7 th tergites with ivory median spots. Median field of postpetiole ± striated. 2 nd tergite between thyridia with longitudinal rugae (fig. 49). 8-11 mm. ...................... V. faunus (GRAVENHORST, 1829)

- Flagellum bristle-shaped or ± lanceolate, preapical flagellar segments square or slightly transverse, narrower than 1 st flagellar segment. (figs 77-78) Apical tergites with or without ivory coloration. Postpetiole and 2 nd tergite often with different structure.............4

4 6 th and 7 th tergites with large ivory spots; also 5 th tergite with ivory spot OR orbit opposite to antennal groove ivory. Hind femur red, sometimes blackish apically. Hind coxa without scopa. Pterostigma ochreous. .........................................................................5

- 6 th tergite black; if with ivory spot, then orbit opposite to antennal groove black OR hind femur black. Hind coxa with or without scopa. Pterostigma ochreous, brown or black. ...................................................................................................................................6

5 Scutellum ivory. Hind femur red, at most with narrow infuscate apex. 5 th tergite with ivory spot; orbit opposite to antennal groove black. Hind coxa with sparse punctures apico-ventrally (as fig. 94). 9-13 mm. ............................... V. maculicauda ( PERKINS, 1953)

- Scutellum black. Hind femur red, usually widely infuscate apically. 5 th tergite black, orbit opposite to antennal groove sometimes with ivory spot. Hind coxa with dense punctation ventrally. 8-11 mm. ............................ V. krapinensis (SCHMIEDEKNECHT, 1928)

6 Metasoma completely black or at most 7 th tergite with small ivory spot.............................7

- 7 th tergite, often also 6 th tergite with large ivory spot. .........................................................8

7 Flagellum lanceolate; 1 st flagellar segment 1.6-1.9× as long as wide, widest segments wider than long. Scutellum entirely yellow. Hind coxa with sparse punctures ventrally, sometimes partly smooth ventrally (fig. 94). Hind femur red, brown or black. Pterostigma chestnut-brown. .......................................... V. atricolor (BERTHOUMIEU, 1910)

- Flagellum filiform; 1 st flagellar segment 2.5× as long as wide, widest flagellar segments longer than wide. Scutellum black or with apical yellow margin. Hind coxa densely punctate ventrally. Hind femur red. Pterostigma blackish. 11 mm ........................... ................................................................................................. V. albignator AUBERT, 1994

8 6 th tergite with wide ivory spot. Median field of postpetiole often with longitudinal rugosity (fig. 48)..................................................................................................................9

- 6 th tergite at most with narrow ivory apical margin. Median field of postpetiole with regular punctation (fig. 46)................................................................................................11

9 Hind coxa with distinct scopa (as fig. 92). Scutellum black. Hind femur red. 10-12 mm. .... ......................................................................................... V. extremator (THUNBERG, 1822)

- Hind coxa without scopa. Scutellum ivory or yellowish apically. Hind femur red or black.. ................................................................................................................................10

10 Smaller, 8-10 mm. Flagellum with 34-38 segments. In profile, gena at most as wide as eye. Hind femur black or reddish-brown. External surface of hind tibia without or with few (1-2) denticular spines (as fig. 101)..................... V. dumeticola (GRAVENHORST, 1829)

- Larger, 12-15 mm. Flagellum with 45-47 segments. In profile, gena wider than eye (fig. 89). Hind femur often ± red. External surface of hind tibia with several (5-7) denticular spines (as fig. 99). .................................... V. monostagon (GRAVENHORST, 1820)

11 Hind coxa with scopa (as fig. 93). In profile, gena wider than eye (fig. 80). 2 nd and 3 rd tergites with rather coarse punctures (fig. 43). 8-11 mm. ...................................................... ................................................................................ V. albosignatus (GRAVENHORST, 1829)

- Hind coxa without scopa, with ± regular punctation. In profile, gena narrower than eye and almost not narrowed in ventral half (fig. 83). Punctation of basal tergites various.....12

12 Scutellum completely ivory. Flagellum with 34-36 segments. Epicnemial carina slightly elevated behind fore coxa. Punctation of 2 nd and 3 rd tergites weaker (fig. 46). 8- 10 mm. ...................................................................... V. digrammus (GRAVENHORST, 1820)

- Scutellum with small apical reddish or ivory spot. Flagellum with 41 sgements. Epicnemial carina ± elevated behind fore coxa. Rugose punctation of 2 nd and 3 rd tergites coarser (fig. 59). 11-12 mm. .................................. V. tenuicornis (HEINRICH, 1930)

13 Epicnemial carina ± elevated and bilobed behind fore coxa..............................................14

- Epicnemial carina low behind fore coxa, not bent forward. ..............................................16

14 Hind coxa with scopa (fig. 92). Femora black. Vertex with weak reddish spot (fig. 9). Mesosoma black, only scutellum yellow. 11 mm. ....................................... V. hinzi nov.sp.

- Hind coxa without scopa. Femora usually red, rarely ± black. Vertex usually with ivory stripe (fig. 13). Collar and subtegular ridge ivory OR scutellum black. ............................15

15 Collar, subtegular ridge and scutellum yellow. Flagellum with 33-36 segments. 8.5-10 mm. ............................................................................ V. perversus (KRIECHBAUMER, 1893)

- Collar, subtegular carina and scutellum black. Flagellum with 37 segments. 9-10 mm. ....... ........................................................................................ V. submontanus (HEINRICH, 1951)

16 Scutellum ivory, slightly elevated, without or with lateral carina at basal 0.2. .................17

- Scutellum black, almost flat, with lateral carina in basal half. .........................................18

17 Hind coxa without scopa. Median field of postpetiole not distinctly separated by latero-median carina. 2 nd and 3 rd tergites densely punctate, smooth between punctures (fig. 45). External surface of hind tibia with numerous denticular spines (fig. 99). 7-9 mm ......... ..................................................................................... V. callicerus (GRAVENHORST, 1820)

- Hind coxa with scopa (as fig. 93). Median field of postpetiole separated from lateral fields by ± distinct latero-median carina. 2 nd and 3 rd tergites densely punctate; 2 nd tergite with ± longitudinal rugae medially (fig. 56). External surface of hind tibia with few (2-4) denticular spines (fig. 101). 8-9 mm ................. V. rhenanus (HABERMEHL, 1918)

18 Postpetiole without distinct latero-median carina, median field not separated from lateral fields (fig. 60). 5 th tergite with ivory spot. In profile, gena 0.6× as wide as eye. 10 mm. ............................................................................ V. tenuipes (BERTHOUMIEU, 1896)

- Postpetiole with latero-median carina, median field ± elevated and separated from lateral fields (fig. 50). 5 th tergite without ivory spot. In profile, gena at least as wide as eye (fig. 91). ......................................................................................................................19

19 Hind coxa without scopa. 1 st flagellar segment 2.1-2.2× as long as wide. MI 1.1-1.2. External surface of hind tibia with multiple denticular spines (as fig. 99). 8-10 mm. ........... ....................................................................................... V. tergenus (GRAVENHORST, 1820)

- Hind coxa with distinct scopa. 1 st flagellar segment 1.8× as long as wide. MI 0.6. External surface of hind tibia with 1-2 denticular spines (as fig. 101). ................................. ...................................................................................... V. gemellus (GRAVENHORST, 1829)