Monanthia evidens Drake, 1927b: 53 (syn. Drake & Maa, 1953: 90). HT: female, Philippines, Luzon, Nueva Vizcaya, Imugan; USNM.
Monanthia formosa Drake, 1923: 102 (junior primary homonym of Monanthia formosa Stål, 1858, Gargaphia; rejected by Drake & Ruhoff, 1965: 186). HT: male, Taiwan, Kochun, Kankau; ZMHB (coll. Horn).
Monanthia formosana Drake & Maa, 1953: 90. Misspelling.