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Photo#87416
Big Robber - Promachus giganteus

Big Robber - Promachus giganteus
Huachuca Mts., Cochise County, Arizona, USA
November 14, 2006
Size: ~20mm
Largest robber I think I've seen. Can anyone ID from this somewhat dark image?

Images of this individual: tag all
Big Robber - Promachus giganteus Big Robber - Promachus giganteus

Moved
Moved from Giant Robber Flies.

You're not mistaken
about the size. This is Promachus giganteus, black, hairy, and huge.

Moved
Moved from Robber Flies.

Moved
Moved from Flies.

Promachus sp. (truquii perhaps)
This appears to be a Promachus female. It seems Arizona has a lot of Promachus diversity, however. These have occurred in AZ or nearby: albifacies, atrox, dimidiatus, giganteus, magnus, minusculus, nigrialbus, sackeni, and truquii. The description of truquii seems to match this specimen - also truquii has been collected from the Huachuca Mountains in AZ and other locations in Mexico. Maybe someone else can help eliminate the other possibilities.

 
Thanks Steve -
maybe someone will get it to species, but I am glad to know the genus and about the diversity of Promachus in AZ.

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