Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada
large robber fly - Promachus vertebratus

large robber fly - Promachus vertebratus
Algona, Kossuth County, Iowa, USA
July 6, 2012
Size: inch & 1/4 est.
Hanging (this is the natural orientation of the image) in the shade of 100+ heat index afternoon.

Moved from Robber Flies.

large robber fly
This male looks like a Promachus. P. vertebratus seems a good fit. See here: Give Herschel a chance to look at it before moving to species as I could be mistaken.

Is this Efferia aestuans?

Moved from ID Request.