The Ombava (Achyra massalis) is a moth of the Crambidae family. It is found in most of the Old World tropics, including La Réunion, Namibia and Australia (including New South Wales, Queensland and Western Australia).
The wingspan is about 20 mm. Adults have light to dark brown forewings with a submarginal dark band and a dark spot near the centre.
The larvae are considered agricultural pests and have been recorded feeding on Pennisetum glaucum. They are off-white, greenish or reddish and have three dark red lines along the body. They only feed at night. By day they rest in a web in the soil near the host plant.
Achyra massalis Wikipedia
It is sometimes listed as a synonym of Achyra coelatalis.