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Photo#25766
Robber Fly - Promachus albifacies - male

Robber Fly - Promachus albifacies - Male
Mt Zion, Golden, Jefferson County, Colorado, USA
July 15, 2005
Medium sized robber fly.

Promachus
This is the male Promachus albifacies. Closely related to our eastern Promachus bastardii. This group of Promachus males are all notable for that bright white shining taillight.

 
That was quick
Thanks Herschel, now there's a male and a female in the guide.

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