News: http://www.mscibarra.com/products/indic ... racts.html
These are CSI symbols "EF2" and "EMI".
If you've got a position in the June 2011 contract of either one, you would normally think about rolling over to the Sept contract sometime around June 12th or so. But the June-2011 contract is the last one they list at CME; you'll want to switch to the NYSE/LIFFE for the Sept-2011 contract.