Ants like a mixture of honey and water, insects, and greases. They will eat almost anything except solid food. All food must be liquid. Not only food, ants need water. --Angelo
Ant larvae can consume solids unlike adult ants. --Morosophomyrmex
That's funny. I've seen ants move powered sugar. I think in general to actually consume food this is correct. Yes, ants do need water -- especially during a drought. That explains why they can be found around faucets, toilets, and sinks in houses during dry weather. They are foraging for water. --Mr. Ant
Some species, like the leaf-cutter ants (Atta and Acromyrmex), use leaves to produce fungi in their nests as a food source. Harvester ants (e.g. Pogonomyrmex) collect seeds to store food. Some species even use aphids, as if they were their cows, for their juice from plants. Some species forage by going to various fruits and flowers to collect nectar, especially with the honey pot ants. There are some honey pot ants (Myrmecocystus) that stay in the colonies to act the container with their HUGE abdomens, and they can barely move! --Ant and UMI