Microstylum-morosum
Guides
Microstylum
Giant Robber Flies
Microstylum is a genus of large robber flies (family Asilidae) containing at least 130 described species. The genus includes North America's largest robber fly, Microstylum morosum, which reaches 35–50 mm in body length. Species in this genus are characterized by their substantial size relative to other Asilidae and a mystax (facial beard) confined to the oral margin and composed of stout bristles. The genus has a broad distribution with species occurring in North America, the Neotropics, and Madagascar.