Psilopa leucostoma

Distinguished from other North American Psilopa by the black body with pale halteres and legs. The male has a white face, the source of the species name which means white mouth. Larvae mine leaves of Chenopodiaceae or Amaranthaceae, depending on the classification in use. The guide to Dutch leaf mines describes the mine on Chenopodium as irregular narrow corridor, rather abruptly widening into a small blotch; at start of the mine at leaf lower-surface an egg shell (may fall off). Larvae have also been recorded from Beta (as a possibly economically important pest of sugar beets) and Atriplex (a possible reservoir allowing infestation of crops).