Dasymutilla foxi is a species of velvet ant found in Mexico and the southwestern United States. Dasymutilla foxi is locally common, and "setal coloration is highly variable; each of the body segments varies from whitish to reddish, and most eastern populations (Colorado, Kansas, Texas) have a black setal patch on the mesosoma."
This species was first described by entomologist Theodore D. A. Cockerell and is named for . Dasymutilla phoenix and Dasymutilla dugesii have been synonymized with this species. According to C. E. Mickel in 1928, "The females vary in size from 5 to 11 mm...A note on two of the specimens collected by Cockerell states that this species is parasitic in the nests of Diadasia species."