Robber Fly - Promachus - BugGuide.Net

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Photo#130825

Copyright © 2007 Hartmut Wisch

Robber Fly - Promachus -

Mount Pinos, ~6800 ft., Kern County, California, USA
July 24, 2007
Size: 25 mm

While looking at some rather frustrating skippers, something big flew by. Pursuing it, I found this fly with anthophorid prey ~ 10m farther. Luckily it stayed more or less at the same altitude and didn't fly down the steep slope.
I'm still unsure as to who's who in Asilidae . Perhaps Herschel can help.

Contributed by Hartmut Wisch on 26 July, 2007 - 12:18am
Last updated 28 November, 2010 - 1:39pm

Moved

Moved from Giant Robber Flies.

… v belov, 28 November, 2010 - 1:39pm

Moved

Moved from Robber Flies.

… Hartmut Wisch, 2 October, 2007 - 11:25am

Robber

Appears to be a Promachus and there are amazingly only three in CA and you don't get the widespread eastern P. bastardii. May be female P. albifacies.

… Herschel Raney, 26 July, 2007 - 7:35am

Promachus

seems good for now - moving to genus.

… Hartmut Wisch, 2 October, 2007 - 11:24am

Thanks, Herschel,

I see that we have a couple of images of albifacies . By the way, do you know how the three CA spp. differ?

… Hartmut Wisch, 26 July, 2007 - 10:35am

Hi, Hartmut

The comment thread under my post below attempts to address your question:

Of course, Herschel has far, far more experience than I do here!! So I'm hoping he'll chime in there.

… Aaron Schusteff, 21 July, 2016 - 3:44am

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