Mesopsocus immunis
Size about 5 mm. The females have very tiny wings and appear wingless, the males are fully winged. The body is a pale yellow suffused with brown markings.
other Mesopsocus
female 
male 
good photos of a specimen. Males will require detailed photos of genitalia
Found mainly on branches of deciduous and evergreen trees and bushes and is particularly common on Hawthorn.
June and July.
Occasional but widespread in Britain.
Occasional in Leicestershire and Rutland.
National Barkfly Recording Scheme (Britain and Ireland) - see species account and key https://schemes.brc.ac.uk/barkfly/key/A1-B-C2-D20.htm
AJ Cann
Leicester Knighton Park
17 May 2023
AJ Cann
Leicester Knighton Park
17 May 2023
David Gould
The Spearwort Fields, Aylestone
23 June 2010
female, on Alder branch
David Gould
The Spearwort Fields, Aylestone
21 June 2010
male
AJ Cann
Croft Pasture
22 May 2022
AJ Cann
Leicester Knighton Park
17 May 2023
Female subgenital plate
Leicestershire & Rutland Map
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MAP KEY:
Yellow squares = NBN records (all known data)
Coloured circles = NatureSpot records: 2025+ | 2020-2024 | pre-2020
UK Map
Species profile
- Species group:
- Barklice & Booklice
- Kingdom:
- Animalia
- Order:
- Psocoptera
- Family:
- Mesopsocidae
- Records on NatureSpot:
- 10
- First record:
- 21/06/2010 (Gould, David)
- Last record:
- 03/06/2025 (Timms, Sue)
Total records by month
% of records within its species group
10km squares with records
The latest images and records displayed below include those awaiting verification checks so we cannot guarantee that every identification is correct. Once accepted, the record displays a green tick.
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Latest images
Latest records
David Gould
The Spearwort Fields, Aylestone
23 June 2010
female, on Alder branch
Mark Skevington
Abbey Park
01 June 2017
AJ Cann
Croft Pasture
22 May 2022
AJ Cann
Billesdon Woodland Pool
04 June 2022
