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Cyllecoris histrionius
Family: Miridae

This strikingly marked and elongate bug is common on oak across the UK. The largely black pronotum is strongly narrowed at the front, forming a distinct collar which is marked with yellow or white.

This species overwinters as eggs, which hatch in spring producing pale whitish blue-green larvae. Adults are found mainly from late May to July.

A largely predatory bug, feeding on other small animals such as aphids and bark flies, as well as unopened oak catkins and young acorns.

Compare Campyloneura virgula

Adult: May-July
Length 6-8 mm
Cyllecoris histrionius
Adult: north London (May 2007) ©Tristan Bantock

Cyllecoris histrionius Cyllecoris histrionius
Adult: north London (May 2008) ©Tristan Bantock

Adult: west London (May 2008) ©Julian Oliver

Cyllecoris histrionius nymph Cyllecoris histrionius nymph
Final instar nymph: west London (May 2008) ©Julian Oliver

Final instar nymph: Cheshire (May 2008) ©Shane Farrell