Photos show the life history and larval damage symptoms of the leafminer Chromatomyia horticola (Goureau) (Diptera: Agromyzidae). This species is one of the most important pests commonly found on vegetables in China. In this issue (pp. 594-600), a study on the morphology of the preimaginal (egg to pupa) stages and the division of larval instars of C. horticola is reported. Photos taken and prepared by CAO Li-Jun and WEI Shu-Jun in Beijing.