[2] The species is found Eastern Colombia, the Amazonas area of Venezuela, across Brazil from the northwest to the northeast and south to below São Paulo in the east of that country.

Forewing is medially semi-translucent with prominent triangular white patch on costa.

The semi-translucent area of the hindwing has dark, poorly defined spot beneath it.The length of the forewing is 22–27 mm.

[3] M. hedylaria can be distinguished from M. cascaria by the presence of extensive semi-translucent areas on the wings and the prominent white triangular mark on the forewing.

The pale chestnut brown color of the apex helps to distinguish M. hedylaria from M. conifera.