The first one is for the egr as stated, and if memory serves me right the other one is for one of two things. The air cleaner control valve or was used to shut off the vacuum advance during warm up. Both are for emission control garbage. Plug them or get the chrome go fast part. If you the book for your car check the vacuum hose routing to see if you really need them at all.

To everyone out there... OK, what car used that funky vacuum operated Exhaust valve crossover?