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For Insects, Spiders & Their Kin
For the United States & Canada
Robber fly with prey - Promachus truquii - male

Robber fly with prey - Promachus truquii - Male
Brown Canyon, Baboquivari Mountains, Pima County, Arizona, USA
August 28, 2008
It appears to have a honeybee.

Moved from Giant Robber Flies.

And I will have to pull key to attempt species. But this is a fine male. P. bastardii does not occur in AZ. So this is one I have not seen. It is not minisculus, sackeni or albifacies so will be new for the guide.

By elimination, this must be atrox or magnus and I have no description for either.

I now have the P. atrox description and it has a very white mystax. This may be P. magnus, still not 100%.

Promachus truquii;
mainly a Mexican sp., which ranges northward into the SW US. Nice photo!

Thanks for the ID
Thanks for the ID