Onebala euargyra is a moth in the family Gelechiidae. It was described by Alfred Jefferis Turner in 1919. It is found in Australia, where it has been recorded from Queensland.[1]
The wingspan is 12 mm. The forewings are whitish, on the dorsal half suffused with fuscous and with a short fuscous strigula on the costa at one-third and another on the middle. There is an elongate-triangular fuscous spot on the costa at two-third, as well as a broad silvery transverse line from the termen beyond the tornus to near the costa before the apex and there are four longitudinal black streaks beyond this, as well as a black terminal line. The hindwings are grey, ochreous-whitish towards the base.[2]