Bastilla simillima is a moth of the family Noctuidae.

It is found in India, Sri Lanka, Vietnam, China, Indonesia, the Philippines and Australia.

Similar to Bastilla arcuata, differs in antemedial line being curved and with some dark diffusion inside it.

Some dark suffusion can be seen instead of the dark patch inside the postmedial line, which has two slight angles in it beyond the cell.

There is an indistinct dentate submarginal line present.