Elateridae of the British Isles

Ischnodes sanguinicollis (Panzer, 1793)

Size – 8-10mm.

Description – Black head and elytra, with a dark red pronotum. Longitudinal rows of pits are obvious running the lenght of the elytra. A dense covering of black hairs, long for an Elaterid,┬áis visible. The legs and antennae are black. The antennae are strongly segmented and are long, extending a way beyond the posterior edge of the pronotum.

National Biodiversity Network map showing the distribution of Ischnodes sanguinicollis across Britain and Ireland.

British and Irish distribution of Ischnodes sanguinicollis (Panzer, 1793) based on records held by the National Biodiversity Network.

Distribution data supplied by:

  • Countryside Council for Wales
  • Natural England

Distribution – A scattered distribution mainly in the south east of England, with most records coming from Hertfordshire and London. Isolated records from Worcestershire, Somerset and Devon.

Biology – The larvae are primarily associated with Ash (Fraxinus excelsior) and Elm (Ulmus spp.), but are also known from Beech (Fagus sylvatica) and Field Maple (Acer campestre), where they occur in relatively soft rotten wood and in wood mould. An association with birds nests is also known. The larvae pupate and eclose at the end of the summer and the imago spends the winter inside the pupal case. On energence the imagos are crepuscular.