Three new Cerodontha species from Inner Mongolia and Qinghai with a checklist of thirty-two Chinese species (Diptera, Agromyzidae)

Three species, Cerodontha (Dizygomyza) flavilunulata sp. nov., C. (D.) granditerga sp. nov., C. (D.) tumefacta sp. nov., are new to science, and four species, C. (Cerodontha) flavicornis (Egger, 1862), C. (D.) labradorensis Spencer, 1969, C. (Poemyza) beigerae Nowakowski, 1972, and C. (P.) muscina (Meigen, 1830), are recorded from China for the first time. A key and a checklist with photographs of morphological features and male genitalia are presented.