Cephus spinipes


    A black and yellow striped wasp mimic formerly called C. cultratus. This species of stem boring sawfly is very similar to Cephus pygmeus and detailed examination is needed to separate the two species.

    Similar Species

    Very similar to Cephus pygmeus.

    Identification difficulty
    ID guidance
    • Less swollen antennal club (pre-apical segments NOT broader than long)
    • Hind tibia yellow with at most the apex ringed darker
    • Sawsheath protrudes at a downward angle to body profile (viewed side-on)
    • Claws with an erect inner tooth, not parallel to the end tooth
    Recording advice

    A specimen must be keyed with a microscope. Please describe how you reached an identification.


    Can be seen on a variety of flowers and other vegetation.

    When to see it

    Spring and summer.

    Life History

    This is a stem boring sawfly, the larvae living in the stems of mushrooms etc.

    UK Status

    Fairly common and widespread in England and Wales.

    VC55 Status

    Fairly frequent in Leicestershire and Rutland.

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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