Crawling at your feet,' said the Gnat (Alice drew her feet back in some alarm), `you may observe a Bread-and-Butterfly. Its wings are thin slices of Bread-and-butter, its body is a crust, and its head is a lump of sugar.' And what does IT live on?' Weak tea with cream in it.' A new difficulty came into Alice's head. `Supposing it couldn't find any?' she suggested. Then it would die, of course.' But that must happen very often,' Alice remarked thoughtfully. It always happens,' said the Gnat.