The larvae of the fly Calycomyza artemisiae mine the leaves of Mugwort and some related plant species.  The mine is an opaque, pale upper-surface blotch.

See the National Agromyzidae Recording Scheme webpage for this species for further details of puparium and adult insect .

The micro moth Leucospilapteryx omissella and tephritid fly Trypeta artemisiae 

(ref.: Warrington, B.P. (2023).  Calycomyza artemisiae. Accessed at https://agromyzidae.co.uk/species/agromyzidae/phytomyzinae/calycomyza/calycomyza-artemisiae/ on 12/12/2023)

Leaf-mine  Adult

Provide backlit photographs of the whole leaf-mine in the leaf, 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.

Leafmines are mainly encountered between May and November.

Pupation occurs outside of the mine.

Local

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

Status in Leicestershire and Rutland not known.