Diptera - Agromyzidae Phytomyza spondylii or P.pastinacae Leaf mine on Hogweed, Heracleum. The leafmines of Phytomyza spondylii and Phytomyza pastinacae are very similar, larvae need rearing for accurate identification

Phytomyza spondylii or Phytomyza pastinacae
Wimborne, Dorset. August 2017