Thorybes mexicana, the Mexican cloudywing, mountain cloudy wing or Nevada cloudy wing, is a butterfly of the Hesperiidae family. It is found in the high elevation mountains of the western United States south into Mexico. Subspecies confusis is often treated as a separate species, known as the confused cloudywing or eastern cloudywing (Thorybes confusis). This subspecies is found from southeastern Pennsylvania west to Missouri, south along the Atlantic Coastal plain to central Florida, the Gulf Coast and Texas. Strays can be found up to southeastern Kansas, southern Illinois and New Jersey.