| Family: | Lyonetiidae |
| Subfamily: | Cemiostominae |
| Genus: | Leucoptera |
| Species: | lathyrifoliella |
| Authority: | (Stainton, [1865]) |


The abundance in each month is indicated as follows:
No records
Very occasional
Irregular
Uncommon
Off-peak, but not unusual
Off-peak, but not unusual
Main flight time| J | F | M | A | M | J | J | A | S | O | N | D | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Adult | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() |
| Larval | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() |
| Site | Date | Quantity | Recorder | Stage |
|---|---|---|---|---|
| Luccombe (SZ57) | 1959 | - | Unknown | - |
| Luccombe (SZ57) | 01/06/1969 | - | J M Chalmers-Hunt, L T Ford, E C Pelham-Clinton | Larval |
| Shanklin (SZ58) | 20/05/1973 | four | David Appleton | Adult |
| Luccombe (SZ57) | 20/07/1974 | five | Richard J Dickson | Adult |
| Luccombe (SZ57) | 20/09/1977 | - | A Maitland Emmet | Larval |
| Luccombe (SZ57) | 20/09/1977 | - | AMEmmet, EC Pelham-Clinton, Dr JD Bradley, RWJ Uffen | Larval spinning |
| Luccombe (SZ57) | 04/08/2003 | - | J R Langmaid, B Elliott | Mine |
| Lake (SZ58) | 03/09/2011 | - | David Biggs | Mine |
| Luccombe (SZ57) | 23/09/2011 | - | Rob Wilson | Mine |
| Shanklin (SZ58) | 01/09/2012 | two | David Biggs | Mine (vacated) |
| Shanklin (SZ58) | 19/07/2013 | one | Rob Wilson | Mine |
| Bonchurch (SZ57) | 13/06/2016 | 81 | Phil Barden | Mine |
| Bonchurch (SZ57) | 19/06/2016 | 170 | Phil Barden | Mine |
| Bonchurch (SZ57) | 21/06/2016 | three | Phil Barden | Adult |
| Bonchurch (SZ57) | 01/07/2017 | - | Phil Barden | Mine |
| Monk's Bay (SZ57) | 05/07/2017 | - | Phil Barden | Mine |
| Shanklin (SZ58) | 22/07/2017 | 120 | Iain Outlaw | Larval |
| Bonchurch (SZ57) | 26/06/2018 | one | Phil Barden | Adult |
| Appley Steps (SZ58) | 16/08/2018 | 10 | Iain Outlaw | Mine |
| Appley Steps (SZ58) | 14/07/2020 | - | Iain Outlaw | Larval |
| Shanklin (SZ58) | 27/07/2020 | two | Iain Outlaw | Adult |
| Shanklin (SZ58) | 28/07/2020 | two | Iain Outlaw | Adult |
| Bonchurch (SZ57) | 30/09/2020 | - | Phil Barden | Mine |
| Bonchurch (SZ57) | 10/07/2021 | - | Phil Barden | Mine |
| Appley Steps (SZ58) | 01/06/2022 | - | Iain Outlaw | Mine |
| Appley Steps (SZ58) | 18/06/2022 | 18 | Iain Outlaw | Adult |
| Appley Steps (SZ58) | 19/06/2022 | 10 | Iain Outlaw | Adult |
| Appley Steps (SZ58) | 21/06/2022 | two | Iain Outlaw | Adult |
| Shanklin (SZ58) | 30/06/2022 | two | Iain Outlaw | Adult |
| Luccombe (SZ57) | 23/07/2022 | - | Iain Outlaw | Mine |
| Bonchurch (SZ57) | 21/09/2022 | - | Phil Barden | Mine |
| Shanklin (SZ58) | 17/11/2022 | - | Iain Outlaw | Mine |
| Site | Date | Quantity | Recorder | Stage |
|---|---|---|---|---|
| Stubby Copse Inclosure (SU30) | 16/07/1939 | - | W Fassnidge | Larval |
| New Forest (SU20) | 20/05/1940 | five | S N A Jacobs | Adult |