Promachus albifacies

Promachus albifacies is a species of robber fly in the family Asilidae, described by Williston in 1885. Like other members of the genus Promachus, it belongs to the group commonly known as "giant robber flies"—large, conspicuous predatory flies. The species name "albifacies" (white-faced) suggests a distinctive pale facial coloration. As with other Promachus species, it is presumed to be an aggressive aerial predator of other insects, though specific behavioral and ecological details for this species remain poorly documented in published sources.