This species was first described in 1897 by Edward Meyrick using material collected in Castle Hill by George Hudson.

Hindwings as in forewings, but first three streaks obsolete, other two nearer base, post-median curved, hardly angulated.

[9] When the larvae emerge from their eggs, they eat into the leaves or buds of their host, hiding from predators.

[9] They are low but fast flyers and constantly vibrate their wings to enable them to take off rapidly.

[9] The host plants for the larvae of Notoreas isoleuca are endemic species within the genus Kelleria.