Green Eyed Robber Fly

Subject:  What is it?
Geographic location of the bug:  Central Texas
Date: 06/25/2021
Time: 10:52 AM EDT
Your letter to the bugman:  I found this on its back and decided to spray it as it looks mean! It has a long needle-like nose and long thin wings, only two though.
How you want your letter signed:  Thanks, Russell

Dang Russell.  That is one large Robber Fly.
We are quite confident you encountered the Green Eyed Robber Fly, Microstylum morosum, and according to Zoo Safari USA: “Very little is known about this species, but it is the largest of the Robber Flies in North America.”  Here is a BugGuide image.  You might want to contact your local natural history museum to see if they want the specimen.