Ichneumon stramentor


    Length 13 to18 mm. Female - Long tapered abdomen, first half yellow and rear half black, with yellow spot at the tip (both on the top and beneath. Legs have black femora; tibiae are half yellow blending into brown that exceeds to the tarsi. Black thorax (with yellow spot) and black head. Long dark antennae with broad white patch about half way along its length. Wings have a brownish tinge. Male has all dark antennae, no yellow spot to the tip of the abdomen but can't be easily distinguished from other similar species.

    Identification difficulty

    Female , Male


    Meadows, hedgerows and woodland edge.

    When to see it

    April to July.

    Life History

    The larva parasitise the Large Yellow Underwing and Setaceous Hebrew Character moth caterpillars (possibly others), the adult wasp lays its eggs inside the caterpillar, the developing larva then eats it from the inside.

    UK Status

    Probably quite frequent, but little recorded in Britain.

    VC55 Status

    Status in Leicestershire and Rutland not known.

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    Leicestershire & Rutland Map

    MAP KEY:

    Yellow squares = NBN records (all known data)
    Coloured circles = NatureSpot records: 2020+ | 2015-2019 | pre-2015

    UK Map