Orthenches is een geslacht van vlinders van de familie koolmotten (Plutellidae).
Soorten O. celeterica Bradley, 1982 O. clytandra Meyrick, 1931 O. chartularia Meyrick, 1924 O. chlorocoma Meyrick, 1885 O. delosticha Bradley, 1962 O. dictyarcha Meyrick, 1927 O. disparilis Meyrick, 1931 O. dissimulatrix Meyrick, 1931 O. drosochalca Meyrick, 1905 O. epiphricta Meyrick, 1907 O. glypharcha Meyrick, 1919 O. homerica (Salmon, 1956) O. liparochroa Turner, 1923 O. nivalis Philpott, 1927 O. osteacma Meyrick, 1931 O. pleurosticta Turner, 1923 O. polita Philpott, 1918 O. porphyritis Meyrick, 1886 O. prasinodes Meyrick, 1886 O. saleuta Meyrick, 1913 O. semicretata Meyrick, 1931 O. semifasciata Philpott, 1915 O. septentrionalis Philpott, 1930 O. similis Philpott, 1924 O. ungulata Meyrick, 1913 O. vinitincta Philpott, 1917 O. virgata Philpott, 1920