The larvae mine leaves, usually of Laburnum. The mine is an upper surface gallery along one margin towards the tip of the leaf, enlarging into a blotch on the other margin. Frass pale green when fresh, brownish later.  The primary and secondary feeding lines are clear.

See the National Agromyzidae Recording Scheme website for further details of larva, adult insect and host plants

Phytomyza cytisi and the micro-moth Leucoptera laburnella 

(ref.: Warrington, B.P. (2023).  Agromyza demeijerei. Accessed at https://agromyzidae.co.uk/species/agromyzidae/agromyzinae/agromyza/agromyza-demeijerei/ on 10/12/2023)

Leaf-mine Adult  

Provide backlit photographs of the whole leaf-mine in the leaf, and the larva, and note the host plant. 

Click on the 'further details' link in the 'Description' section above.  Then click on the Phenology tab which will provide phenology details for both adult and larval stages.

Nationally Scarce B

Warrington, B. P. 2022. A provisional review of the status of Agromyzidae in Great Britain & Northern Ireland

Status in Leicestershire and Rutland not known.

http://www.leafmines.co.uk/html/Diptera/A.demeijerei.htm

https://bladmineerders.nl/parasites/animalia/arthropoda/insecta/diptera/brachycera/agromyzidae/agromyzinae/agromyza/agromyza-demeijerei/