| Host attributes | Description |
| Flora Europaea | Entered if host plant name was checked in the Flora Europaea |
| Non-native | Entered if host plant was not a native species in the British Isles |
| Taxon untraced | Entered if plant host name could not be found in Hortus 3rd or Index Kewensis |
| CTW (GB flora) | Entered if host plant name was checked in Flora of the British Isles, 2nd edn., Clapham, Tutin and Warburg, 1962, Cambridge University Press (current names in host plant dictionary checked against New Atlas of the British & Irish Flora, Preston et al., 2002. Oxford University Press) |
| No checklist | Entered for permitted non-Latin names (typically broad host categories, e.g. coniferous trees) |
| Not GB species | Entered if non-British insects were reported as hosts of British invertebrates |
