Isturgia catalaunaria is a moth of the family Geometridae first described by Achille Guenée in 1858.

Male with long antennae branches with simple shaft at extremity.

A medial band incurved below cell and often joined to the antemedial line by blotches on inner area.

Straight postmedial line present, where the area beyond it suffused with purplish fuscous.

[2] Larva known to feed on plants like Rhynchosia totta, Indigofera daleoides, Caesalpinia species and Delonix regia.