Onebala probolaspis is a moth in the Gelechiidae family. It was described by Meyrick in 1929. It is found in South Africa. The wingspan is about 11 mm. The ground colour of the forewings is brown, but this is little visible. The basal area is glossy leaden-grey,enclosing an elongate blackish white-edged median blotch from the base to one-fourth, with some dark fuscous suffusion towards the dorsum beneath this, and a light glossy leaden-grey white-edged fascia from the upper end of this area to the dorsum beyond middle limits a large irregularly rounded triangular blackish-fuscous white-edged dorsal blotch. There is a rather angulated light leaden-grey fascia from the middle of the costa confluent with the preceding fascia near the dorsum, this fascia includes a wedge-shaped streak of groun