I spotted this hit-man at work a few days ago. Don't ask me what kind of assassin bug it is, because with over 3000 species of them on the planet, it's something I don't know the answer to. I did, however, spend way too much time trying to find the answer. Thankfully, the Sears serviceman came to fix the fridge and I had to get off the computer.
This bug is quite formidable. It would stab me just as quickly as it stabbed the unfortunate spotted cucumber beetle in the picture.
I don't know why they call them cucumber beetles, because I haven't found anything they won't at least nibble on. I guess Cucumber is first in line alphabetically of things they'll eat. They don't like Artichokes, Beets, Broccoli, Brussels Sprouts, Cabbage, Cauliflower, or Celery. That leaves Corn and Cucumber next in line. They nibble on Corn, but love Cucumber. I'm sure scientists used that very educated line of thought when naming the voracious beetle dude.
They devour the leaves of young seedlings and their larvae attack the roots. I take great joy in squishing them, when I can catch them. I know, I'm sick that way.