Thyrocopa vagans is a moth of the family Xyloryctidae.

It is endemic to the Hawaiian island of Kauai.

Adults are on wing at least in May, August, and September.

The ground color of the forewings is mostly very light gray, mottled with a few brown scales, darker near thorax and along the costal margin.

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