Ichneumon extensorius - Ichneumon extensorius
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Species Description
True status is unknown but likely to be widespread and fairly common. Habitat includes: hedgerows, woodland, scrub, gardens, parks, allotments, churchyards, meadows, grassland etc. Flight period: March to November. Length: 8 - 16 mm. ID: Female is almost identical to Ichneumon confusor whom has more yellow legs than extentorius.
Ichneumon suspiciosus and Ichneumon albiger are also virtually identical.
Perkins key entry: Flagellum with 43-44 flagellomeres and completely black with short, narrow tyloids on 6-15, 17, face (almost) completely yellow but clypeus often black at medial apex; T2-3 yellow; hind tibiae yellow with apical 0.33 black, hind tarsi (including fifth segment) completely pale . . . . . . . . . . . . . . . . . . . . . . . I. terminatorius Gravenhorst, 1820 . This approx 18mm (quite big for genus), 44+44 flagellum, short narrow Tyloids on F6-15(16) - as is often the case tyloid on 16 is there but smaller, rear tarsi are all pale, T2&3 yellow, and the face is all yellow inc clypeus.
Extremely most likely:
Ichneumon albiger / Br = yes, locality = no - Female has white on the last two turgids. / Ichneumon confusor / Br = yes, locality = no - Female has white on the last two turgids and legs are more yellow. / Ichneumon extensorius / Br = yes, locality = no - Female has white on the last two turgids and legs are more orange. /
Most likely:
Ichneumon terminatorius / Br = yes, locality = no Male has Flagellum with 43-44 flagellomeres and completely black with short, narrow tyloi. Female has white on the last three turgids. x Ichneumon suspiciosus / Br = yes, locality = yes Female is very similar but has white on the last three turgids merging onto the ovipositor. x Ichneumon simulans / Br = yes, locality = no - Female has no white mid spot. x Ichneumon sculpturatus / Br = yes, locality = no Female has white on the last two turgids. - Ichneumon primatorius / Br = yes, locality = no Female has white on the last three turgids plus large white spots on the shoulder and rear two thighs. x Ichneumon oblongus / Br = yes, locality = no - Female has no white mid spot plus white on the last two turgids. x Ichneumon molitorius / Br = yes, locality = no Female has distinctive yellow markings on all mid tibia's. x Ichneumon minutorius / Br = yes, locality = no Female has red thighs on front legs, the rest are black. x Ichneumon melanotis / Br = yes, locality = no Female has yellow on the top half of the mid tibia's. x Ichneumon haemorrhoicus / Br = yes, locality = no Female has white on the last two turgids plus red-ish legs. x Ichneumon gracilicornis / Br = yes, locality = yes Female has white on the last three turgids. x Ichneumon gracilentus / Br = yes, locality = no Female has cream rings around the joint between the thigh and the body of the rear two legs. - Ichneumon extensorius / Br = yes, locality = no - Female has white on the last two turgids. / Ichneumon emancipatus / Br = yes, locality = no Ichneumon confusor / Br = yes, locality = no - Female has white on the last two turgids. / Ichneumon bucculentus / Br = yes, locality = no Female is very similar but has white on the last three turgids merging onto the ovipositor. x Ichneumon albiger / Br = yes, locality = no - Female has white on the last two turgids. /
52 species
- Ichneumon albiger /
- Ichneumon alius
- Ichneumon alpestris
- Ichneumon analis
- Ichneumon aquilonius
- Ichneumon bellipes
- Ichneumon bucculentus /
- Ichneumon caloscelis
- Ichneumon cessator x
- Ichneumon computatorius -
- Ichneumon confusor /
- Ichneumon crassifemur x
- Ichneumon deliratorius x
- Ichneumon didymus -
- Ichneumon emancipatus /
- Ichneumon exilicornis -
- Ichneumon extensorius /
- Ichneumon formosus x
- Ichneumon gracilentus /
- Ichneumon gracilicornis /
- Ichneumon haemorrhoicus /
- Ichneumon ignobilis x
- Ichneumon inquinatus -
- Ichneumon insidiosus -
- Ichneumon languidus x
- Ichneumon lautatorius x
- Ichneumon ligatorius -
- Ichneumon lugens x
- Ichneumon megapodius -
- Ichneumon melanotis /
- Ichneumon memorator -
- Ichneumon minutorius /
- Ichneumon molitorius /
- Ichneumon mordax
- Ichneumon oblongus /
- Ichneumon primatorius /
- Ichneumon rufidorsatus
- Ichneumon sarcitorius x
- Ichneumon sculpturatus /
- Ichneumon simulans /
- Ichneumon spurius
- Ichneumon stigmatorius -
- Ichneumon stramentarius -
- Ichneumon stramentor -
- Ichneumon suspiciosus /
- Ichneumon terminatorius /
- Ichneumon tuberculipes x
- Ichneumon vafer x
- Ichneumon validicornis -
- Ichneumon ventus
- Ichneumon vulneratorius -
- Ichneumon xanthorius -