Phytomyza chaerophylli is a species of leaf mining fly in the family Agromyzidae which is found in Europe.

[8] The larvae make a short upper-surface gallery following a leaf margin which widens, so that within the confined limits of some umbelliferous leaves often forms a secondary blotch.

Larvae leave the leaf through a semi-circular slit in the lower epidermis to pupate in the soil.

[9][10] Plant species which the fly larvae feed on include Sison amomum.

[10] This article related to members of the muscomorph flies superfamily Opomyzoidea is a stub.