Snake-flies, alderflies, lacewings and scorpion flies in Essex Nineta flava (Scopoli, 1763) National status: Common (Common) Predicted county status: Common/— Distribution Very common in broad-leaved and mixed woodlands, occasionally in more open situations with trees. Habitat and ecology There is very strong evidence to suggest that there is either a preference for, or an obligatory association with, deciduous oak trees. Threats None perceived. Etymology From the Latin flavum = yellow. In my experience, this insect is not especially more yellow than any of the other green lacewings, though museum specimens do fade to yellow rapidly and it may be that Scopoli described the species from such a faded specimen. Nineta vittata (Wesmael, 1841) National status: Common (Common) Predicted county status: Common/— Distribution Widespread, but evidently rather more local than N. flava. Habitat and ecology Like N. flava, this is an arboreal species, though elsewhere in Britain it is apparently associated with a far wider variety of broad-leaved tree species than its congener. Threats None perceived. Etymology From the Latin vitta = a band, ribbon or fillet hence vittata = an adjectival form, means bound with a band/ribbon/fillet. The reason is not immediately apparent, but Wesmael comments, whilst describing the species, that one of the main characteristics of vittata is the pale median stripe; it is assumed that his name refers to this pale band. 212 Essex Naturalist (New Series) 17 (2000)