Zale undularis, the black zale moth, is a moth of the family Noctuidae (or in some classifications, Erebidae).

It is found in the eastern United States and southern Ontario.

The head, body, abdomen, and wings are of a very dark brown, bordering on black, and appear somewhat glossy.

All the wings are a little dentated, and on the anterior ones, from the base to the extremity, is a series of black indented lines or bars, whereof the last or outer one is strong and conspicuous, crossing the wing from the anterior to the posterior edges, about a quarter of an inch from the external margin.

The underside is of a lighter colour, with the same kind of markings, but fainter.