A new species of Platylomia Stål, 1870 (Hemiptera: Cicadidae) from Vietnam, with a key to species

One new species of the Platylomia radha species group, Platylomia minhi sp. nov., from Sapa, Hoang Lien National Park, Lao Cai province, north Vietnam is described. Synonymic lists for the five species of the Platylomia genus from Vietnam are provided. A key to five species of Platylomia genus: Platylomia bocki, Platylomia duffelsi, Platylomia malickyi, Platylomia operculata, and new species from Vietnam is provided.