Katydid from Costa Rica

Subject:  What is this
Geographic location of the bug:  San Jose, Costa Rica
Date: 12/03/2018
Time: 01:36 PM EDT
Your letter to the bugman:  Saw this a few weeks ago in San Jose Costa Rica in the late afternoon. Note the barb. What is this?
How you want your letter signed:  Jim R

Dear Jim,
This is a Katydid in the family Tettigoniidae, and what you have described as a “barb” is actually an ovipositor, an organ adapted to function during the egg laying process, indicating that this is a female.  We do not recognize the species.