Eurypteryx dianae

Eurypteryx dianae is a moth of the Sphingidae family which is known from Guangxi in China.

The length of the forewings is about 32 millimetres (1.3 in). It is similar to Eurypteryx geoffreyi. There is a small round stigma and greyish semicircular marginal area on the forewing upperside and a round yellowish discal spot on the forewing underside. Here, a dark brown almost straight submarginal line is also present, separating the lighter marginal area from the darker rest of the wing. The hindwing underside has a dark brown postmedian line.