Four species of the genus Luzonomyza Malloch, 1929 from southwest China are described as new to science: Luzonomyza vittifacies Li & Yang, sp. nov., L. serrata Li & Yang, sp. nov., L. honghensis Li & Yang, sp. nov., and L. brevis Li & Yang, sp. nov. A key to Luzonomyza species is also presented.