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Tropidosteptes pacificus
Family: Miridae

A medium-sized yellowish bug with rather transparent forewings. The pronotum has a prominent pale collar, a pale unpunctured posterior margin and two dark spots close to the anterior margin. The 1st antennal segment is pale in both sexes; the remaining segments are almost entirely dark in males but the 2nd segment is mostly pale in females.

Adults and nymphs are associated with Ash Fraxinus and there may be more than one generation a year, since the species appears to have a long season.

Native to the USA and a recent arrival in Britain, first recorded in 2012 from the London area. Likely to be a  horticultural introduction, but natural spread from Holland, where the species was first detected, cannot be ruled out.

Adult: June-September
Length: 4-5 mm
Tropidosteptes pacificus
Adult male: north London: (June 2012) ©Tristan Bantock

Tropidosteptes pacificus Tropidosteptes pacificus
Adult female: north London: (June 2012) ©Tristan Bantock

Adult male: north London: (June 2012) ©Tristan Bantock