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Dicranocephalus medius
Family: Stenocephalidae

This family has two representatives in Britain, both of which are Dicranocephalus species. Despite their large size and bold markings, they are difficult to separate externally. Habitat and host plant are a very useful guide to identification. D. medius is smaller and less elongate.

D. medius is a scarce species which has been recorded from central and
southern Britain, where it is associated with wood spurge and leafy spurge in woodland clearings. Adults overwinter and mate in May, the new generation appearing from August onwards.

Compare D. agilis

Adult: All year
Length 8-11 mm
Dicranocephalus medius
Adult: Hants (August 2010) ©Tristan Bantock

Dicranocephalus medius Dicranocephalus medius
Adult: Hants (August 2010) ©Tristan Bantock

Adults: Shropshire (May 2007) ©John Bingham