Call him out on it?

How dare you not watch over your bosses shoulder and do his job for him! Shame on you OP! On a serious note, either find another job, or if you work for a corporation try going to a higher up. Good luck!

Go to a higher up OP. Your boss shouldn't be blaming any screw ups on employees, instead he should take full responsibility.

Making your boss look good is always important. If she's a good manager, you may earn her trust by letting her blame you publicly, and talk about it with a wink and a nod behind closed doors. But if she was just attacking you in private, get out.

Sounds like your boss is Michael Scott.

I think he misunderstood when he was told how to delegate responsibility.

Did he know he was responsible when he reprimanded you though?

Its called saving-face and is a signature go-to move for bosses who aren't decent human beings. Sad that they do not realise how much respect for them you lose; because they are incapable of admitting their mistakes. Don't let it psychologically get you down. Tell a few close colleagues the truth and you'll feel better knowing the facts are out there.

I think that's called having a job.

How did he keep a straight face while doing it?