Giant Robber Fly

Subject:  Cross between a wasp and dragonfly
Geographic location of the bug:  Maryland
Date: 09/12/2017
Time: 12:02 AM EDT
Any ideas? Some are calling this a cicada killer but those look MUCH more like wasps…this has a more dragonfly like tail but appears to only have two wings..
How you want your letter signed —
Chris in Md

Giant Robber Fly

Dear Chris,
This is a predatory Robber Fly, and you were astute to observe that it has a single pair of wings.  We believe it is a Giant Robber Fly in the genus
Promachus which is well represented on BugGuide.

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