Tu les as identifiées comment tes femelles
gravipes?
Avec ma maigre expérience, ce qui m'étonne moi dans cette clé c'est l'importance donnée aux couleurs et l'absence de mesures (le rapport L/l des fémurs postérieurs, par exemple, n'est donc en rien discriminant?)
S'il s'agit de
gravipes, la clé de Tolknitz lui donne une
aréole (
area superomedia) plus étroite que la
deuxième aire latérale (cf. couplet 17 (20)**). Or sur mon spécimen l'arole est nettement plus large que l'a deuxième aire médiane. Non?
Une autre "incohérence" de Tolkanitz?
Je ne vois pas de schéma du
propodeum de
gravipes dans Tolkanitz (2007) mais j'en ai trouvé une photo dans Choi & al. (2016)*. Effectivement le
propodeum de
gravipes est plus proche de mon spécimen (forme des carènes et pilosité dans le coin postérieur externe de 2ème aire latérale).
Au passage, sur cette photo, l'
aréole du
propodeum est effectivement plus large que l'aire latérale (mesures au niveau des costulae), contrairement à ce qu'indique la clé dans Tolkanitz (2007).
Mais dans la description de
gravipes que donnent Choi & al., plusieurs critères ne correspondent pas vraiment à mon spécimen qui a (si je vois bien):
- le
pronotum est poilu (et non
glabre)
- le
spiracle que je dirais plus allongé qu'
elliptique, est surtout connecté à la
carène pleurale
- les carènes du T1, très fortes, atteignent le milieu du T1
Dernier point, un extrait de Fonscolombe 1849 (cf
ici)
"
Exochus gravipes
Ex.
pedibus rufis,
coxis nigris, m. f. Grav.
La tégule est ordinairement couleur de poix ou noire avec une tache blanchâtre du côté de la tête, quelquesfois sans tache. Les jambes postérieures sont rousses sans la
base blanchâtre."
Je ne sais pas bien ce que signifie ce "Ex...." (exemplaires de Gravenhorst ont pieds rouges et hanches noires???) mais la
tégula est bien à moitié blanche ici.
*
Choi, J. K., Kolarov, J., & Lee, J. W. (2016). A taxonomic review of the genus Exochus Gravenhorst (Hymenoptera: Ichneumonidae: Metopiinae) from South Korea with descriptions of ten new species. Journal of natural history, 50(37-38), 2327-2367.
**
Traduction partielle de la clé dans Tolkanitz (2007) que j'utilise:
1 (64) Epipleura of the 3rd abdominal tergite are wedge-shaped, the inner edge 0.75 of its length from the base of the tergite straight or slightly concave (fig. 1)
2 (7) Yellow-edged forehead on the sides, yellow border continuously connected with yellow spots on top eye orbits or narrowly interrupted (Fig. 21). Yellow spots on top of ophthalmic orbits triangular, elongated lengthwise head (fig. 21, 22)
7 (2) The forehead on the sides without a yellow border, if with a border, then it not connected with yellow spots on top of the eye orbits. Yellow spots on top of ophthalmic orbits of a different shape.
8 (21) Nervulus is interstitial or almost interstitial.
9 (10) Head width less than 2 times its length (Fig. 15). Dorsal longitudinal keels propodeum gradually approaching from its top to the base, often there are no costula (Fig. 98). The propodeum spiracles are small, oval. Hind femur usually black (Fig. 176). The face of the female and male is black. 3.9-4.2. Parasite Wiltesia truncicolella Stt. (Pyraustidae). - Russia (European part, Krasnodar Territory, Orenburg and Irkutsk region, Yamalo-Nenets n.o., Far East current), Ukraine, Moldova, Armenia, Kazakhstan, Middle Nyaya Asia; Western Europe, Mongolia .... .... E. albicinctus Holmgr.
10 (9) Head width 2 times or more exceeds it length. The dorsal longitudinal keels at the costula level are sharply bent, there are costulae (Fig. 103, 114). The propodeum spiracles are elongated-oval. Rear femora are red-yellow.
11 (12) 2-3 abdominal tergites red or with red patterned. Metapleura with hairs. 4.6–5.0. - Russia (Leningrad, Voronezh and Rostov reg., Krasnodar and Stavropol Territories), Ukraine; Western Europe .................................. E. gravis Grav
12 (11) The abdomen is entirely black. Metapleura naked or with hairs.
13 (14) Legs are red-yellow, only hind tibia on the top is shaded (Fig. 157). Second lateral propodeum fields with hairs on posterior external corners (Fig. 105). The face of the female and male is completely black or black with a yellow triangular outgrowth between the base of the antennae (Fig. 7). 4.9. - Far East Russia; Japan ................. E. nigrifaciatus Mom. et al.
14 (13) All coxae fully or at least partially posterior black, other parts of the legs red-yellow. Second lateral fields of propodeum without hairs or with hairs (Fig. 101). The face of the female (sometimes male) black with a yellow triangular outgrowth between the antennae, the face of the male is often yellow.
15 (16) Hind coxae black above, yellowish below (Fig. 164). The face of the male is always yellow, the clypeus is usually black (Fig. 49), rarely yellow. Metapleura in the middle with several hairs or bare. 4.0. (Female unknown). - Russia (European part, Chitins-Kaya region., Sakhalin), Ukraine, Belarus; Hungary, Germania, Mongolia ................................ E. argutus Tolk.
16 (15) The coxae are entirely black (Fig. 159, 160, 174). The face of the female and male is black with a yellow pattern on top or the male’s face is sometimes yellow.
17 (20) The areola of the propodeum is wide, wider than the second lateral fields (Fig. 114, 115). Hind tibia red yellow, darkened at the top. Pterostigmus brown.
18 (19) All coxae and trochanters are completely black. Female face and the male black with a yellow triangular outgrowth between the base of the antennae. 4.5–5.2. - Russia (Yaroslavl, Lipetsk, Chita region, Yakutia, Far East current), Ukraine (Volyn, Lviv and Donetsk reg.) ................ E. similis Tolk.
19 (18) Fore and middle coxae and trochanters predominantly essentially yellow, hind coxae black with yellow spot at the top (Fig. 160). The face of the male is black, above with yellow V-shaped pattern (Fig. 54). 4.4. (Female unknown). - Ukraine (Kharkov region) ..... ............ E. karazini Tolk.
20 (17) The areola of the propodeum is not wider than the second lateral fields. Hind tibia red-yellow, on top not darkened. Pterostigmus yellow-brown. Female face black, often with a yellow triangular outgrowth between base of antennae; male face yellow or black with yellow cross stripe on top. 4.2–5.5. Parasite Yponomeuta padellus L., Y. evonymellus L. (Yponomeutidae), Acrobasis consociella Hbn. (Phycitidae). - Russia (European part, Kabardino-Balkaria, Irkutsk region., Yakutia, Sakhalin, Kuril Islands - Kunashir), Belarus, Ukraine, Kazakhstan; almost all of western europa, China (Manchuria), North America ............ ........... E. gravipes Grav.
qui correspondent bien à ton specimens et que j'ai identifié comme E. gravipes. La face noire et la carenation du 
