Rivula is a genus of moths in the family Erebidae described by Achille Guenée in 1845.
Palpi porrect (extending forward), the second joint thickly scaled, and third joint minute. A sharp front tuft present. Antennae minutely ciliated. Thorax and abdomen smoothly scaled. The typical section has the tibia of the male nearly naked. Forewings with nearly rectangular apex. Veins 7, 8 and 9 stalked. Hindwings with stalked veins 3 and 4.[1]
. George Hampson . 1894 . The Fauna of British India, Including Ceylon and Burma: Moths Volume II . Taylor and Francis . Biodiversity Heritage Library.