My initial thought when I first noticed this beetle was, "That is the freakiest thing I've ever seen."
Second thought, "I better run and get my camera!"
After a quick internet search I found this beetle to be a Female Broad Necked Root Borer.
Here's a little more info:
The stinger is actually the ovipositor of the female and she uses her ovipositor to deposit eggs. According to BugGuide: “Eggs are inserted into ground (or under litter) in groups. Larvae tunnel downward to feed on living roots of a variety of trees and shrubs. At first they may feed on bark, but then proceed to hollow out small roots.
Initially, I was a little hesitant to post these pictures. Then I reminded myself that is what this blog is, a journal of sorts on all the unusual and whimsical things I come across in my everyday life.
(Also, after seeing this girl in her beetle attire, how could I not post the real-life inspiration?)