To receive your new airdrop tokens, you should ADD them to your wallet.
Step 1: find Add TOKEN/ Add Custom Token button.
Step 2: fill contract information, Token Symbol and Decimals
after save the Token detail, then tokens will be added to the list of tokens.
You can check them in your balance now.
I join in some airdrops,but theres no information about the airdrop giveaway or on the site about adding token and contract info, they just want my eth wallet.Maybe the info will be given after ICO?