Choristostigma zephyralis is a moth in the family Crambidae first described by William Barnes and James Halliday McDunnough in 1914.

[1] It is found in North America, where it has been recorded from California.

Both are filled with purple and attached to the costal stripe.

The hindwings are sulphur yellow with a subbasal dark line which is only prominent above the inner margin.

There is a small discal dot and a subterminal line.