Cydalima diaphanalis is a moth in the family Crambidae. It was described by Francis Walker in 1866.[1] It is found in Burma, Indonesia (Java, Sumatra, Kepulauan Aru, Papua New Guinea), on the Solomon Islands[2] and in Thailand and Australia, where it has been recorded from Queensland and South Australia.
The wings are white with a small black dot near the middle. The forewings have a brown costa and there are black dots on the margin near the wingtip.[3]