Diogmites platypterus, also known as the Black Hanging Thief, is a species of robber fly in the family Asilidae. This species of robber fly is dark brown to black, has a slender body, and broad wings. The wings of this species are darker, wider, and longer than any other species within the genus.
Range Diogmites platypterus can be found in the eastern United States. While more common within the midwest and south, there are a few records of the species as far east as Georgia and South Carolina.
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