New fossils of the families Nemopteridae and Chrysopidae are recorded and a new species of Hemerobiidae, Sympherobius yulei sp. nov., is described from the late Eocene Insect Bed of the Isle of Wight. The new nemopterid belongs to the tribe Stenonemiini and is very similar to a specimen already recorded from the Early Oligocene of Alsace (France), suggesting that these warm-climate insects were not affected by the ‘Oi-1 Glaciation' cooling.