Selandria serva

    Description

    Length 6 to 8 mm. This is a bright orange-bodied sawfly with a black head, antennae and thorax. The legs are also orange and the wings have a dark stigma. Note that the side colour of the thorax is not diagnostic (it may be sexual dimorphism or simple variability).

    Similar Species

    There could be confusion with Brachythops flavens, but this usually has some yellow on the first antennal segments and also on the front of the thorax.

    There are two UK species in this genus. Selandria melanosterna (formerly sixii) is very similar to sterna but larger (8 - 14mm), and less common. S. serva has the third antennal segment shorter than the three  terminal segments combined, whereas in S. melanosterna the third segment is longer than the final three.

    Habitat

    Wetland areas.

    Life History

    The larvae graze the leaves of various grasses and rushes.

    UK Status

    Fairly frequent in Britain.

    VC55 Status

    Locally common in Leicestershire and Rutland.

    Leicestershire & Rutland Map

    UK Map