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Home » Guide » Arthropods (Arthropoda) » Hexapods (Hexapoda) » Insects (Insecta) » Flies (Diptera) » Orthorrhapha » Asiloidea » Robber Flies (Asilidae) » Asilinae » Giant Robber Flies (Promachus)
Photo#1729976
Giant robber fly - Promachus - female
Copyright © 2019 Kurt Foster

Giant robber fly - Promachus - Female
Sidney, Champaign County, Illinois, USA
August 11, 2019
Size: approx 3.8 cm
Snapped with cell phone just before 3:09 PM. Image cropped and shrunk to reduce file size. Side of 2x4 where sitting was measured later, at 1.5 inches (3.8 cm).

Best guess Promachus rufipes
tag · login or register to post comments
Contributed by Kurt Foster on 21 September, 2019 - 9:13am
Last updated 31 March, 2020 - 5:32pm

Moved
Moved from Asilinae.
… Chris Cohen, 31 March, 2020 - 5:32pm login or register to post comments

Perhaps a more likely suspect...
...is Promachus hinei which seems to be more common in my area.

Thanks for sexing subject as female. I suspected but wasn't certain.
… Kurt Foster, 26 September, 2019 - 8:24am login or register to post comments

Moved
Moved from ID Request.
… John F. Carr, 21 September, 2019 - 9:24am login or register to post comments

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