Heteropacha is a monotypic moth genus in the family Lasiocampidae described by Leon F. Harvey in 1874.

[1][2][3] Its only species, Heteropacha rileyana, or Riley's lappet moth, was described by the same author in the same year.

It can be found in the US states of Mississippi, Missouri, Texas and Georgia.

The moths are on wing from late April to August.

This article on a moth of the family Lasiocampidae is a stub.