Diaphania exclusalis is a moth in the Crambidae family. It was described by Walker in 1865. It is found in Colombia, Venezuela, Ecuador, Panama, Costa Rica and Mexico. The length of the forewings is 12.5–14 mm for males and 12.1–14 mm for females. The forewings are brown with an oval translucent band. The hindwings are brown with a quadrangle translucent band and with long hair-like curved scales on the anal margin.