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Closeup photograph of the face of a Black Horse Fly from Prince George's Co., Maryland (8/21/2013). Photo by
USGS PWRC. (
MBP list)
A Black Horse Fly collected in Upper Marlboro, Maryland (8/22/2013). Photo by
USGS PWRC. (
MBP list)
A Black Horse Fly collected in Upper Marlboro, Maryland (8/22/2013). Photo by
USGS PWRC. (
MBP list)
Black Horse Fly in Baltimore Co., Maryland (6/12/2020). (c) Emily L. Stanley, all rights reserved. Photo by
Emily Stanley. (
MBP list)

A Black Horse Fly in St. Mary's Co., Maryland (7/25/2015). Photo by
Tyler Bell. (
MBP list)

A Black Horse Fly in St. Mary's Co., Maryland (7/25/2015). Verified by John S. Ascher/BugGuide. Photo by
Tyler Bell. (
MBP list)

Black Horse Fly in Prince George's Co., Maryland (8/29/2013). (c) USGS Bee Inventory and Monitoring Lab, some rights reserved (CC BY). Photo by
Sam Droege. (
MBP list)

Black Horse Fly in Prince George's Co., Maryland (8/26/2013). (c) USGS Bee Inventory and Monitoring Lab, some rights reserved (CC BY). Photo by
Sam Droege. (
MBP list)

Black Horse Fly in Prince George's Co., Maryland (8/29/2013). (c) USGS Bee Inventory and Monitoring Lab, some rights reserved (CC BY). Photo by
Sam Droege. (
MBP list)

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