Cacopsylla ulmi (Foerster, 1848)

Cacopsylla ulmi is an insect of the Psyllidae family. It mainly feeds on Elm. Cacopsylla ulmi is a widespread species in Europe, including Britain and the Balkans. Adults are 3.6–4.3 mm long. The head is 1–1.01 mm wide, with a vertex which is 0.5 mm wide and 0.24–0.28 mm long. The genal cones are laterally somewhat concave, and 0.25 mm long. Antennae are 1.89–2.0 mm. Forewings are 3.5 mm long and 1.4 mm wide.